838 lines
29 KiB
Python
838 lines
29 KiB
Python
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#!/usr/bin/env python3
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"""Analyze JVM and Java application logs for operational findings."""
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from __future__ import annotations
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import argparse
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import json
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import re
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import sys
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from collections import Counter
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from datetime import datetime
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from pathlib import Path
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from typing import Any
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EXIT_OK = 0
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EXIT_FINDINGS = 1
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EXIT_INVALID = 2
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UNKNOWN = "UNKNOWN"
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SEVERITY_ORDER = {"CRITICAL": 0, "WARNING": 1}
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CRITICAL_PATTERNS = [
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{"name": "OutOfMemoryError", "pattern": "OutOfMemoryError", "symptom": "jvm_memory"},
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{"name": "Java heap space", "pattern": "Java heap space", "symptom": "jvm_memory"},
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{"name": "GC overhead limit exceeded", "pattern": "GC overhead limit exceeded", "symptom": "jvm_memory"},
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{"name": "StackOverflowError", "pattern": "StackOverflowError", "symptom": "jvm_stack"},
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{"name": "NoClassDefFoundError", "pattern": "NoClassDefFoundError", "symptom": "class_loading"},
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{"name": "ClassNotFoundException", "pattern": "ClassNotFoundException", "symptom": "class_loading"},
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{"name": "ExceptionInInitializerError", "pattern": "ExceptionInInitializerError", "symptom": "class_loading"},
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{"name": "SSLHandshakeException", "pattern": "SSLHandshakeException", "symptom": "tls_certificate"},
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{"name": "CertificateExpiredException", "pattern": "CertificateExpiredException", "symptom": "tls_certificate"},
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{"name": "SQLException", "pattern": "SQLException", "symptom": "database"},
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{"name": "SQLRecoverableException", "pattern": "SQLRecoverableException", "symptom": "database"},
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{"name": "CommunicationsException", "pattern": "CommunicationsException", "symptom": "database"},
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{"name": "database unavailable", "pattern": "database unavailable", "symptom": "database"},
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{"name": "connection pool exhausted", "pattern": "connection pool exhausted", "symptom": "database"},
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{"name": "FATAL", "pattern": "FATAL", "symptom": "fatal"},
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]
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WARNING_PATTERNS = [
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{"name": "NullPointerException", "pattern": "NullPointerException", "symptom": "application_exception"},
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{"name": "IllegalArgumentException", "pattern": "IllegalArgumentException", "symptom": "application_exception"},
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{"name": "IllegalStateException", "pattern": "IllegalStateException", "symptom": "application_exception"},
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{"name": "SocketTimeoutException", "pattern": "SocketTimeoutException", "symptom": "network_timeout"},
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{"name": "ConnectException", "pattern": "ConnectException", "symptom": "network_connectivity"},
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{"name": "TimeoutException", "pattern": "TimeoutException", "symptom": "network_timeout"},
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{"name": "connection refused", "pattern": "connection refused", "symptom": "network_connectivity"},
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{"name": "connection reset", "pattern": "connection reset", "symptom": "network_connectivity"},
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{"name": "Broken pipe", "pattern": "Broken pipe", "symptom": "network_connectivity"},
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{"name": "WARN", "pattern": "WARN", "symptom": "log_level"},
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{"name": "ERROR", "pattern": "ERROR", "symptom": "log_level"},
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{"name": "retrying", "pattern": "retrying", "symptom": "retry"},
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{"name": "slow query", "pattern": "slow query", "symptom": "database"},
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{"name": "deadlock detected", "pattern": "deadlock detected", "symptom": "database"},
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]
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HTTP_PATTERNS = [
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{"name": "HTTP 500", "pattern": "HTTP 500", "symptom": "http_5xx"},
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{"name": "HTTP 502", "pattern": "HTTP 502", "symptom": "http_5xx"},
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{"name": "HTTP 503", "pattern": "HTTP 503", "symptom": "http_5xx"},
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{"name": "HTTP 504", "pattern": "HTTP 504", "symptom": "http_5xx"},
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]
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ISO_TIMESTAMP_RE = re.compile(
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r"\b(\d{4}-\d{2}-\d{2})[ T](\d{2}:\d{2}:\d{2})([,.]\d{1,6})?\b"
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)
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SYSLOG_TIMESTAMP_RE = re.compile(r"^([A-Z][a-z]{2}\s+\d{1,2}\s+\d{2}:\d{2}:\d{2})\b")
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LEVEL_RE = re.compile(r"\b(TRACE|DEBUG|INFO|WARN|ERROR|FATAL)\b")
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SPRING_LOGGER_RE = re.compile(r"\s---\s+\[[^\]]+\]\s+([A-Za-z0-9_.$-]+)\s*:")
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GENERIC_LOGGER_RE = re.compile(
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r"\b(?:TRACE|DEBUG|INFO|WARN|ERROR|FATAL)\b\s+(?:\d+\s+)?([A-Za-z0-9_.$-]+)\s*:"
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)
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THREAD_RE = re.compile(r"\[([^\]]+)\]")
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SPRING_THREAD_RE = re.compile(r"\s---\s+\[([^\]]+)\]")
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EXCEPTION_RE = re.compile(
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r"\b((?:[A-Za-z_$][\w$]*\.)+[A-Za-z_$][\w$]*(?:Exception|Error)|[A-Za-z_$][\w$]*(?:Exception|Error))\b"
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)
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STACK_FRAME_RE = re.compile(r"^\s+at\s+")
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CAUSED_BY_RE = re.compile(r"^\s*Caused by:\s+")
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MORE_RE = re.compile(r"^\s*\.\.\.\s+\d+\s+more\b")
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def build_parser() -> argparse.ArgumentParser:
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parser = argparse.ArgumentParser(
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description="Analyze local JVM and Java application logs for operational findings."
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)
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parser.add_argument("--file", required=True, help="Local JVM or Java application log to analyze.")
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parser.add_argument(
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"--format",
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choices=("text", "markdown", "json"),
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default="text",
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help="Report format. Default: text.",
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)
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parser.add_argument("--output", help="Write report to this path instead of stdout.")
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parser.add_argument(
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"--top",
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type=positive_int,
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default=10,
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help="Number of top finding groups, exception types, and symptoms to display. Default: 10.",
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)
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parser.add_argument(
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"--max-samples",
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type=non_negative_int,
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default=3,
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help="Maximum sample lines per finding group. Default: 3.",
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)
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parser.add_argument(
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"--include-stacktraces",
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action="store_true",
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help="Include short multiline stack trace samples in text and Markdown reports.",
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)
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parser.add_argument(
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"--max-stack-lines",
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type=positive_int,
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default=12,
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help="Maximum lines retained per stack trace sample. Default: 12.",
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)
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parser.add_argument(
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"--http-critical-threshold",
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type=positive_int,
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default=5,
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help="HTTP 5xx count that raises HTTP findings to CRITICAL. Default: 5.",
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)
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parser.add_argument(
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"--ignore-case",
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action="store_true",
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help="Match configured patterns case-insensitively.",
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)
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parser.add_argument(
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"--since",
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type=parse_filter_timestamp,
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help='Include lines at or after "YYYY-MM-DD HH:MM:SS".',
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)
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parser.add_argument(
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"--until",
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type=parse_filter_timestamp,
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help='Include lines at or before "YYYY-MM-DD HH:MM:SS".',
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)
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return parser
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def positive_int(value: str) -> int:
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try:
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number = int(value)
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except ValueError as exc:
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raise argparse.ArgumentTypeError("must be a positive integer") from exc
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if number <= 0:
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raise argparse.ArgumentTypeError("must be a positive integer")
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return number
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def non_negative_int(value: str) -> int:
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try:
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number = int(value)
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except ValueError as exc:
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raise argparse.ArgumentTypeError("must be zero or a positive integer") from exc
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if number < 0:
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raise argparse.ArgumentTypeError("must be zero or a positive integer")
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return number
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def parse_filter_timestamp(value: str) -> datetime:
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for fmt in ("%Y-%m-%d %H:%M:%S", "%Y-%m-%dT%H:%M:%S"):
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try:
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return datetime.strptime(value, fmt)
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except ValueError:
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continue
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raise argparse.ArgumentTypeError('expected timestamp format "YYYY-MM-DD HH:MM:SS"')
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def compile_patterns(ignore_case: bool) -> list[dict[str, Any]]:
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flags = re.IGNORECASE if ignore_case else 0
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compiled = []
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for item in CRITICAL_PATTERNS:
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compiled.append({**item, "severity": "CRITICAL", "kind": "pattern", "regex": re.compile(re.escape(item["pattern"]), flags)})
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for item in WARNING_PATTERNS:
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compiled.append({**item, "severity": "WARNING", "kind": "pattern", "regex": re.compile(re.escape(item["pattern"]), flags)})
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for item in HTTP_PATTERNS:
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compiled.append({**item, "severity": "WARNING", "kind": "http_5xx", "regex": re.compile(re.escape(item["pattern"]), flags)})
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return compiled
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def read_log_file(path: Path) -> list[str]:
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if not path.exists():
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raise OSError(f"file does not exist: {path}")
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if not path.is_file():
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raise OSError(f"path is not a regular file: {path}")
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try:
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text = path.read_text(encoding="utf-8", errors="replace")
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except PermissionError as exc:
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raise OSError(f"file is not readable: {path}") from exc
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except OSError as exc:
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raise OSError(f"unable to read file {path}: {exc}") from exc
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if text == "":
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raise ValueError(f"file is empty: {path}")
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return text.splitlines()
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def parse_line_timestamp(line: str, syslog_year: int) -> tuple[datetime | None, str]:
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iso_match = ISO_TIMESTAMP_RE.search(line)
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if iso_match:
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fraction = iso_match.group(3) or ""
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raw = f"{iso_match.group(1)} {iso_match.group(2)}"
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parse_value = raw
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fmt = "%Y-%m-%d %H:%M:%S"
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if fraction:
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parse_value = f"{raw}.{fraction[1:].ljust(6, '0')[:6]}"
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fmt = "%Y-%m-%d %H:%M:%S.%f"
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try:
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return datetime.strptime(parse_value, fmt), raw + fraction
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except ValueError:
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return None, UNKNOWN
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syslog_match = SYSLOG_TIMESTAMP_RE.search(line)
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if syslog_match:
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raw = syslog_match.group(1)
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try:
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parsed = datetime.strptime(f"{syslog_year} {raw}", "%Y %b %d %H:%M:%S")
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except ValueError:
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return None, UNKNOWN
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return parsed, raw
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return None, UNKNOWN
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def line_in_time_window(
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parsed_at: datetime | None, since: datetime | None, until: datetime | None
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) -> bool:
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if parsed_at is None:
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return True
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if since is not None and parsed_at < since:
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return False
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if until is not None and parsed_at > until:
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return False
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return True
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def render_seen(value: tuple[datetime, str] | None) -> str:
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if value is None:
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return UNKNOWN
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return value[1] or value[0].strftime("%Y-%m-%d %H:%M:%S")
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def extract_level(line: str) -> str:
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match = LEVEL_RE.search(line)
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if match:
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return match.group(1)
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return UNKNOWN
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def extract_thread(line: str) -> str:
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for regex in (SPRING_THREAD_RE, THREAD_RE):
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match = regex.search(line)
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if match:
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return match.group(1)
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return UNKNOWN
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def extract_logger(line: str) -> str:
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for regex in (SPRING_LOGGER_RE, GENERIC_LOGGER_RE):
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match = regex.search(line)
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if match:
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return match.group(1)
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return UNKNOWN
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def normalize_exception_type(value: str) -> str:
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return value.split(".")[-1]
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def extract_exception_type(line: str) -> str:
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match = EXCEPTION_RE.search(line)
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if match:
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return normalize_exception_type(match.group(1))
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return UNKNOWN
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def is_stack_start(line: str) -> bool:
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return (
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"Exception in thread" in line
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or CAUSED_BY_RE.search(line) is not None
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or EXCEPTION_RE.search(line) is not None
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)
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def is_stack_continuation(line: str) -> bool:
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return (
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STACK_FRAME_RE.search(line) is not None
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or CAUSED_BY_RE.search(line) is not None
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or MORE_RE.search(line) is not None
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)
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def update_seen(
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group: dict[str, Any], parsed_at: datetime | None, rendered_at: str
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) -> None:
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if parsed_at is None:
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return
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if group["first_seen"] is None or parsed_at < group["first_seen"][0]:
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group["first_seen"] = (parsed_at, rendered_at)
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if group["last_seen"] is None or parsed_at > group["last_seen"][0]:
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group["last_seen"] = (parsed_at, rendered_at)
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def append_limited(items: list[Any], value: Any, limit: int) -> None:
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if limit == 0:
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return
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if value in items:
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return
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if len(items) < limit:
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items.append(value)
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def finding_key(severity: str, name: str) -> str:
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return f"{severity}::{name}"
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def ensure_group(
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groups: dict[str, dict[str, Any]],
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name: str,
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severity: str,
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symptom: str,
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kind: str,
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) -> dict[str, Any]:
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key = finding_key(severity, name)
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return groups.setdefault(
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key,
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{
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"name": name,
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"severity": severity,
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"symptom": symptom,
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"kind": kind,
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"occurrences": 0,
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"stack_trace_count": 0,
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"first_seen": None,
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"last_seen": None,
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"samples": [],
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"stack_trace_samples": [],
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"fields": [],
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},
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)
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def add_finding(
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|
|
groups: dict[str, dict[str, Any]],
|
||
|
|
name: str,
|
||
|
|
severity: str,
|
||
|
|
symptom: str,
|
||
|
|
kind: str,
|
||
|
|
line: str,
|
||
|
|
parsed_at: datetime | None,
|
||
|
|
rendered_at: str,
|
||
|
|
max_samples: int,
|
||
|
|
) -> dict[str, Any]:
|
||
|
|
group = ensure_group(groups, name, severity, symptom, kind)
|
||
|
|
group["occurrences"] += 1
|
||
|
|
update_seen(group, parsed_at, rendered_at)
|
||
|
|
append_limited(group["samples"], line, max_samples)
|
||
|
|
append_limited(
|
||
|
|
group["fields"],
|
||
|
|
{
|
||
|
|
"timestamp": rendered_at,
|
||
|
|
"log_level": extract_level(line),
|
||
|
|
"logger": extract_logger(line),
|
||
|
|
"thread": extract_thread(line),
|
||
|
|
"exception_type": extract_exception_type(line),
|
||
|
|
"raw": line,
|
||
|
|
},
|
||
|
|
max_samples,
|
||
|
|
)
|
||
|
|
return group
|
||
|
|
|
||
|
|
|
||
|
|
def record_stack_trace(
|
||
|
|
groups: dict[str, dict[str, Any]],
|
||
|
|
stack: dict[str, Any],
|
||
|
|
max_samples: int,
|
||
|
|
max_stack_lines: int,
|
||
|
|
) -> None:
|
||
|
|
exception_type = stack["exception_type"] if stack["exception_type"] != UNKNOWN else "Java stack trace"
|
||
|
|
severity = severity_for_exception(exception_type)
|
||
|
|
group = ensure_group(groups, exception_type, severity, "stack_trace", "stack_trace")
|
||
|
|
group["stack_trace_count"] += 1
|
||
|
|
update_seen(group, stack["parsed_at"], stack["rendered_at"])
|
||
|
|
append_limited(group["samples"], stack["lines"][0], max_samples)
|
||
|
|
append_limited(group["stack_trace_samples"], stack["lines"][:max_stack_lines], max_samples)
|
||
|
|
|
||
|
|
|
||
|
|
def severity_for_exception(exception_type: str) -> str:
|
||
|
|
critical = {item["name"] for item in CRITICAL_PATTERNS}
|
||
|
|
if exception_type in critical or exception_type in {"OutOfMemoryError", "StackOverflowError"}:
|
||
|
|
return "CRITICAL"
|
||
|
|
return "WARNING"
|
||
|
|
|
||
|
|
|
||
|
|
def detect_stack_traces(
|
||
|
|
included: list[dict[str, Any]],
|
||
|
|
groups: dict[str, dict[str, Any]],
|
||
|
|
max_samples: int,
|
||
|
|
max_stack_lines: int,
|
||
|
|
) -> int:
|
||
|
|
stack: dict[str, Any] | None = None
|
||
|
|
stack_count = 0
|
||
|
|
|
||
|
|
for item in included:
|
||
|
|
line = item["line"]
|
||
|
|
if stack is None:
|
||
|
|
if is_stack_start(line):
|
||
|
|
stack = {
|
||
|
|
"lines": [line],
|
||
|
|
"exception_type": extract_exception_type(line),
|
||
|
|
"parsed_at": item["parsed_at"],
|
||
|
|
"rendered_at": item["rendered_at"],
|
||
|
|
}
|
||
|
|
continue
|
||
|
|
|
||
|
|
if is_stack_continuation(line):
|
||
|
|
stack["lines"].append(line)
|
||
|
|
if stack["exception_type"] == UNKNOWN:
|
||
|
|
stack["exception_type"] = extract_exception_type(line)
|
||
|
|
continue
|
||
|
|
|
||
|
|
if len(stack["lines"]) > 1:
|
||
|
|
record_stack_trace(groups, stack, max_samples, max_stack_lines)
|
||
|
|
stack_count += 1
|
||
|
|
stack = None
|
||
|
|
if is_stack_start(line):
|
||
|
|
stack = {
|
||
|
|
"lines": [line],
|
||
|
|
"exception_type": extract_exception_type(line),
|
||
|
|
"parsed_at": item["parsed_at"],
|
||
|
|
"rendered_at": item["rendered_at"],
|
||
|
|
}
|
||
|
|
|
||
|
|
if stack is not None and len(stack["lines"]) > 1:
|
||
|
|
record_stack_trace(groups, stack, max_samples, max_stack_lines)
|
||
|
|
stack_count += 1
|
||
|
|
|
||
|
|
return stack_count
|
||
|
|
|
||
|
|
|
||
|
|
def analyze_log(
|
||
|
|
lines: list[str],
|
||
|
|
patterns: list[dict[str, Any]],
|
||
|
|
since: datetime | None,
|
||
|
|
until: datetime | None,
|
||
|
|
top: int,
|
||
|
|
max_samples: int,
|
||
|
|
max_stack_lines: int,
|
||
|
|
http_critical_threshold: int,
|
||
|
|
) -> dict[str, Any]:
|
||
|
|
syslog_year = since.year if since is not None else datetime.now().year
|
||
|
|
groups: dict[str, dict[str, Any]] = {}
|
||
|
|
exception_counts: Counter[str] = Counter()
|
||
|
|
symptom_counts: Counter[str] = Counter()
|
||
|
|
parsed_timestamps = 0
|
||
|
|
unknown_timestamps = 0
|
||
|
|
included: list[dict[str, Any]] = []
|
||
|
|
http_5xx_count = 0
|
||
|
|
context_parsed_at: datetime | None = None
|
||
|
|
context_rendered_at = UNKNOWN
|
||
|
|
|
||
|
|
for line in lines:
|
||
|
|
parsed_at, rendered_at = parse_line_timestamp(line, syslog_year)
|
||
|
|
if parsed_at is None:
|
||
|
|
unknown_timestamps += 1
|
||
|
|
else:
|
||
|
|
parsed_timestamps += 1
|
||
|
|
context_parsed_at = parsed_at
|
||
|
|
context_rendered_at = rendered_at
|
||
|
|
if not line_in_time_window(parsed_at, since, until):
|
||
|
|
continue
|
||
|
|
|
||
|
|
# Stack trace frames often omit timestamps; keep nearby log context for first/last seen.
|
||
|
|
effective_parsed_at = parsed_at
|
||
|
|
effective_rendered_at = rendered_at
|
||
|
|
if parsed_at is None and (is_stack_start(line) or is_stack_continuation(line)):
|
||
|
|
effective_parsed_at = context_parsed_at
|
||
|
|
effective_rendered_at = context_rendered_at
|
||
|
|
|
||
|
|
included.append(
|
||
|
|
{
|
||
|
|
"line": line,
|
||
|
|
"parsed_at": effective_parsed_at,
|
||
|
|
"rendered_at": effective_rendered_at,
|
||
|
|
}
|
||
|
|
)
|
||
|
|
matched_names = set()
|
||
|
|
|
||
|
|
for item in patterns:
|
||
|
|
if not item["regex"].search(line):
|
||
|
|
continue
|
||
|
|
severity = item["severity"]
|
||
|
|
if item["kind"] == "http_5xx":
|
||
|
|
http_5xx_count += 1
|
||
|
|
add_finding(
|
||
|
|
groups=groups,
|
||
|
|
name=item["name"],
|
||
|
|
severity=severity,
|
||
|
|
symptom=item["symptom"],
|
||
|
|
kind=item["kind"],
|
||
|
|
line=line,
|
||
|
|
parsed_at=effective_parsed_at,
|
||
|
|
rendered_at=effective_rendered_at,
|
||
|
|
max_samples=max_samples,
|
||
|
|
)
|
||
|
|
symptom_counts[item["symptom"]] += 1
|
||
|
|
matched_names.add(item["name"])
|
||
|
|
|
||
|
|
exception_type = extract_exception_type(line)
|
||
|
|
if exception_type != UNKNOWN:
|
||
|
|
exception_counts[exception_type] += 1
|
||
|
|
if exception_type not in matched_names:
|
||
|
|
severity = severity_for_exception(exception_type)
|
||
|
|
add_finding(
|
||
|
|
groups=groups,
|
||
|
|
name=exception_type,
|
||
|
|
severity=severity,
|
||
|
|
symptom="application_exception",
|
||
|
|
kind="exception",
|
||
|
|
line=line,
|
||
|
|
parsed_at=effective_parsed_at,
|
||
|
|
rendered_at=effective_rendered_at,
|
||
|
|
max_samples=max_samples,
|
||
|
|
)
|
||
|
|
symptom_counts["application_exception"] += 1
|
||
|
|
|
||
|
|
stack_trace_count = detect_stack_traces(included, groups, max_samples, max_stack_lines)
|
||
|
|
promote_http_5xx(groups, http_5xx_count, http_critical_threshold)
|
||
|
|
|
||
|
|
findings = sorted(
|
||
|
|
(render_group(group) for group in groups.values()),
|
||
|
|
key=lambda item: (
|
||
|
|
SEVERITY_ORDER[item["severity"]],
|
||
|
|
-item["occurrences"],
|
||
|
|
item["name"].lower(),
|
||
|
|
),
|
||
|
|
)
|
||
|
|
|
||
|
|
summary = build_summary(
|
||
|
|
total_lines=len(lines),
|
||
|
|
findings=findings,
|
||
|
|
stack_trace_count=stack_trace_count,
|
||
|
|
http_5xx_count=http_5xx_count,
|
||
|
|
parsed_timestamps=parsed_timestamps,
|
||
|
|
unknown_timestamps=unknown_timestamps,
|
||
|
|
)
|
||
|
|
|
||
|
|
return {
|
||
|
|
"summary": summary,
|
||
|
|
"findings": findings[:top],
|
||
|
|
"top_exception_types": top_items(exception_counts, top),
|
||
|
|
"top_operational_symptoms": top_items(symptom_counts, top),
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
def promote_http_5xx(
|
||
|
|
groups: dict[str, dict[str, Any]], http_5xx_count: int, threshold: int
|
||
|
|
) -> None:
|
||
|
|
if http_5xx_count < threshold:
|
||
|
|
return
|
||
|
|
|
||
|
|
http_names = {item["name"] for item in HTTP_PATTERNS}
|
||
|
|
for old_key, group in list(groups.items()):
|
||
|
|
if group["name"] not in http_names or group["severity"] == "CRITICAL":
|
||
|
|
continue
|
||
|
|
group["severity"] = "CRITICAL"
|
||
|
|
new_key = finding_key("CRITICAL", group["name"])
|
||
|
|
groups[new_key] = group
|
||
|
|
del groups[old_key]
|
||
|
|
|
||
|
|
|
||
|
|
def render_group(group: dict[str, Any]) -> dict[str, Any]:
|
||
|
|
return {
|
||
|
|
"name": group["name"],
|
||
|
|
"severity": group["severity"],
|
||
|
|
"symptom": group["symptom"],
|
||
|
|
"kind": group["kind"],
|
||
|
|
"occurrences": group["occurrences"],
|
||
|
|
"stack_trace_count": group["stack_trace_count"],
|
||
|
|
"first_seen": render_seen(group["first_seen"]),
|
||
|
|
"last_seen": render_seen(group["last_seen"]),
|
||
|
|
"samples": group["samples"],
|
||
|
|
"stack_trace_samples": group["stack_trace_samples"],
|
||
|
|
"fields": group["fields"],
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
def build_summary(
|
||
|
|
total_lines: int,
|
||
|
|
findings: list[dict[str, Any]],
|
||
|
|
stack_trace_count: int,
|
||
|
|
http_5xx_count: int,
|
||
|
|
parsed_timestamps: int,
|
||
|
|
unknown_timestamps: int,
|
||
|
|
) -> dict[str, Any]:
|
||
|
|
critical_groups = sum(1 for item in findings if item["severity"] == "CRITICAL")
|
||
|
|
warning_groups = sum(1 for item in findings if item["severity"] == "WARNING")
|
||
|
|
total_findings = sum(item["occurrences"] for item in findings)
|
||
|
|
|
||
|
|
if critical_groups > 0:
|
||
|
|
status = "CRITICAL"
|
||
|
|
elif warning_groups > 0:
|
||
|
|
status = "WARNING"
|
||
|
|
else:
|
||
|
|
status = "OK"
|
||
|
|
|
||
|
|
return {
|
||
|
|
"overall_status": status,
|
||
|
|
"total_lines_scanned": total_lines,
|
||
|
|
"total_findings": total_findings,
|
||
|
|
"total_stack_traces_detected": stack_trace_count,
|
||
|
|
"critical_finding_groups": critical_groups,
|
||
|
|
"warning_finding_groups": warning_groups,
|
||
|
|
"http_5xx_count": http_5xx_count,
|
||
|
|
"timestamp_coverage": {
|
||
|
|
"parsed_timestamps_count": parsed_timestamps,
|
||
|
|
"unknown_timestamps_count": unknown_timestamps,
|
||
|
|
},
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
def top_items(counter: Counter[str], limit: int) -> list[dict[str, Any]]:
|
||
|
|
return [{"value": value, "count": count} for value, count in counter.most_common(limit)]
|
||
|
|
|
||
|
|
|
||
|
|
def render_text(report: dict[str, Any], include_stacktraces: bool) -> str:
|
||
|
|
lines = ["JVM Log Analyzer", "================", ""]
|
||
|
|
summary = report["summary"]
|
||
|
|
lines.extend(
|
||
|
|
[
|
||
|
|
f"Overall status: {summary['overall_status']}",
|
||
|
|
"Findings require review; logs alone do not prove root cause.",
|
||
|
|
"",
|
||
|
|
]
|
||
|
|
)
|
||
|
|
|
||
|
|
if not report["findings"]:
|
||
|
|
lines.extend(["No configured JVM/application findings were detected.", ""])
|
||
|
|
else:
|
||
|
|
for finding in report["findings"]:
|
||
|
|
lines.extend(
|
||
|
|
[
|
||
|
|
f"[{finding['severity']}] {finding['name']}",
|
||
|
|
f"Occurrences: {finding['occurrences']}",
|
||
|
|
f"Symptom: {finding['symptom']}",
|
||
|
|
f"First seen: {finding['first_seen']}",
|
||
|
|
f"Last seen: {finding['last_seen']}",
|
||
|
|
f"Stack traces linked: {finding['stack_trace_count']}",
|
||
|
|
"Samples:",
|
||
|
|
]
|
||
|
|
)
|
||
|
|
if finding["samples"]:
|
||
|
|
lines.extend(f" - {sample}" for sample in finding["samples"])
|
||
|
|
else:
|
||
|
|
lines.append(" - No samples retained")
|
||
|
|
if include_stacktraces and finding["stack_trace_samples"]:
|
||
|
|
lines.append("Stack trace samples:")
|
||
|
|
for stack in finding["stack_trace_samples"]:
|
||
|
|
lines.append(" ---")
|
||
|
|
lines.extend(f" {entry}" for entry in stack)
|
||
|
|
lines.append("")
|
||
|
|
|
||
|
|
lines.extend(render_text_table("Top Exception Types", report["top_exception_types"]))
|
||
|
|
lines.extend(render_text_table("Top Operational Symptoms", report["top_operational_symptoms"]))
|
||
|
|
lines.extend(render_text_summary(summary))
|
||
|
|
return "\n".join(lines) + "\n"
|
||
|
|
|
||
|
|
|
||
|
|
def render_text_table(title: str, rows: list[dict[str, Any]]) -> list[str]:
|
||
|
|
lines = [title, "-" * len(title)]
|
||
|
|
if not rows:
|
||
|
|
lines.append("No entries detected.")
|
||
|
|
else:
|
||
|
|
lines.extend(f"- {item['value']}: {item['count']}" for item in rows)
|
||
|
|
lines.append("")
|
||
|
|
return lines
|
||
|
|
|
||
|
|
|
||
|
|
def render_text_summary(summary: dict[str, Any]) -> list[str]:
|
||
|
|
coverage = summary["timestamp_coverage"]
|
||
|
|
return [
|
||
|
|
"Operational Summary",
|
||
|
|
"-------------------",
|
||
|
|
f"Overall status: {summary['overall_status']}",
|
||
|
|
f"Total lines scanned: {summary['total_lines_scanned']}",
|
||
|
|
f"Total findings: {summary['total_findings']}",
|
||
|
|
f"Total stack traces detected: {summary['total_stack_traces_detected']}",
|
||
|
|
f"Critical finding groups: {summary['critical_finding_groups']}",
|
||
|
|
f"Warning finding groups: {summary['warning_finding_groups']}",
|
||
|
|
f"HTTP 5xx count: {summary['http_5xx_count']}",
|
||
|
|
f"Parsed timestamps count: {coverage['parsed_timestamps_count']}",
|
||
|
|
f"Unknown timestamps count: {coverage['unknown_timestamps_count']}",
|
||
|
|
]
|
||
|
|
|
||
|
|
|
||
|
|
def render_markdown(report: dict[str, Any], include_stacktraces: bool) -> str:
|
||
|
|
summary = report["summary"]
|
||
|
|
lines = [
|
||
|
|
"# JVM Log Analyzer",
|
||
|
|
"",
|
||
|
|
f"- Overall status: {summary['overall_status']}",
|
||
|
|
"- Finding language is a triage summary; logs alone do not prove root cause.",
|
||
|
|
"",
|
||
|
|
]
|
||
|
|
|
||
|
|
if not report["findings"]:
|
||
|
|
lines.extend(["No configured JVM/application findings were detected.", ""])
|
||
|
|
else:
|
||
|
|
for finding in report["findings"]:
|
||
|
|
lines.extend(
|
||
|
|
[
|
||
|
|
f"## {finding['severity']}: {finding['name']}",
|
||
|
|
"",
|
||
|
|
f"- Occurrences: {finding['occurrences']}",
|
||
|
|
f"- Symptom: {finding['symptom']}",
|
||
|
|
f"- First seen: {finding['first_seen']}",
|
||
|
|
f"- Last seen: {finding['last_seen']}",
|
||
|
|
f"- Stack traces linked: {finding['stack_trace_count']}",
|
||
|
|
"",
|
||
|
|
"Sample log lines:",
|
||
|
|
"",
|
||
|
|
]
|
||
|
|
)
|
||
|
|
if finding["samples"]:
|
||
|
|
lines.append("```text")
|
||
|
|
lines.extend(finding["samples"])
|
||
|
|
lines.append("```")
|
||
|
|
else:
|
||
|
|
lines.append("_No samples retained._")
|
||
|
|
lines.append("")
|
||
|
|
|
||
|
|
if include_stacktraces and finding["stack_trace_samples"]:
|
||
|
|
lines.extend(["Stack trace samples:", ""])
|
||
|
|
for stack in finding["stack_trace_samples"]:
|
||
|
|
lines.append("```text")
|
||
|
|
lines.extend(stack)
|
||
|
|
lines.append("```")
|
||
|
|
lines.append("")
|
||
|
|
|
||
|
|
lines.extend(render_markdown_table("Top Exception Types", report["top_exception_types"]))
|
||
|
|
lines.extend(render_markdown_table("Top Operational Symptoms", report["top_operational_symptoms"]))
|
||
|
|
lines.extend(render_markdown_summary(summary))
|
||
|
|
return "\n".join(lines)
|
||
|
|
|
||
|
|
|
||
|
|
def render_markdown_table(title: str, rows: list[dict[str, Any]]) -> list[str]:
|
||
|
|
lines = [f"## {title}", ""]
|
||
|
|
if not rows:
|
||
|
|
lines.extend(["No entries detected.", ""])
|
||
|
|
return lines
|
||
|
|
lines.extend(["| Value | Count |", "| --- | ---: |"])
|
||
|
|
lines.extend(f"| {item['value']} | {item['count']} |" for item in rows)
|
||
|
|
lines.append("")
|
||
|
|
return lines
|
||
|
|
|
||
|
|
|
||
|
|
def render_markdown_summary(summary: dict[str, Any]) -> list[str]:
|
||
|
|
coverage = summary["timestamp_coverage"]
|
||
|
|
return [
|
||
|
|
"## Operational Summary",
|
||
|
|
"",
|
||
|
|
f"- Overall status: {summary['overall_status']}",
|
||
|
|
f"- Total lines scanned: {summary['total_lines_scanned']}",
|
||
|
|
f"- Total findings: {summary['total_findings']}",
|
||
|
|
f"- Total stack traces detected: {summary['total_stack_traces_detected']}",
|
||
|
|
f"- Critical finding groups: {summary['critical_finding_groups']}",
|
||
|
|
f"- Warning finding groups: {summary['warning_finding_groups']}",
|
||
|
|
f"- HTTP 5xx count: {summary['http_5xx_count']}",
|
||
|
|
f"- Parsed timestamps count: {coverage['parsed_timestamps_count']}",
|
||
|
|
f"- Unknown timestamps count: {coverage['unknown_timestamps_count']}",
|
||
|
|
"",
|
||
|
|
]
|
||
|
|
|
||
|
|
|
||
|
|
def render_json(report: dict[str, Any]) -> str:
|
||
|
|
return json.dumps(report, indent=2, sort_keys=True) + "\n"
|
||
|
|
|
||
|
|
|
||
|
|
def write_report(input_path: Path, output_path: str | None, content: str) -> None:
|
||
|
|
if output_path is None:
|
||
|
|
sys.stdout.write(content)
|
||
|
|
return
|
||
|
|
|
||
|
|
path = Path(output_path)
|
||
|
|
try:
|
||
|
|
if path.resolve() == input_path.resolve():
|
||
|
|
raise OSError("output path must not be the same as input file")
|
||
|
|
path.write_text(content, encoding="utf-8")
|
||
|
|
except OSError as exc:
|
||
|
|
raise OSError(f"unable to write output {path}: {exc}") from exc
|
||
|
|
|
||
|
|
|
||
|
|
def main() -> int:
|
||
|
|
parser = build_parser()
|
||
|
|
args = parser.parse_args()
|
||
|
|
input_path = Path(args.file)
|
||
|
|
|
||
|
|
if args.since is not None and args.until is not None and args.since > args.until:
|
||
|
|
parser.error("--since must be earlier than or equal to --until")
|
||
|
|
|
||
|
|
try:
|
||
|
|
lines = read_log_file(input_path)
|
||
|
|
report = analyze_log(
|
||
|
|
lines=lines,
|
||
|
|
patterns=compile_patterns(args.ignore_case),
|
||
|
|
since=args.since,
|
||
|
|
until=args.until,
|
||
|
|
top=args.top,
|
||
|
|
max_samples=args.max_samples,
|
||
|
|
max_stack_lines=args.max_stack_lines,
|
||
|
|
http_critical_threshold=args.http_critical_threshold,
|
||
|
|
)
|
||
|
|
|
||
|
|
if args.format == "text":
|
||
|
|
content = render_text(report, args.include_stacktraces)
|
||
|
|
elif args.format == "markdown":
|
||
|
|
content = render_markdown(report, args.include_stacktraces)
|
||
|
|
else:
|
||
|
|
content = render_json(report)
|
||
|
|
|
||
|
|
write_report(input_path, args.output, content)
|
||
|
|
except (OSError, ValueError) as exc:
|
||
|
|
print(f"CRITICAL: {exc}", file=sys.stderr)
|
||
|
|
return EXIT_INVALID
|
||
|
|
except RuntimeError as exc:
|
||
|
|
print(f"CRITICAL: runtime error: {exc}", file=sys.stderr)
|
||
|
|
return EXIT_INVALID
|
||
|
|
|
||
|
|
if report["summary"]["overall_status"] == "OK":
|
||
|
|
return EXIT_OK
|
||
|
|
return EXIT_FINDINGS
|
||
|
|
|
||
|
|
|
||
|
|
if __name__ == "__main__":
|
||
|
|
sys.exit(main())
|