Script to gather info about a java process - useful for producing informative bug reports.

java_debug_capture.sh

#!/bin/bash
#
# Quickly collect information about a java process:
# - heap dump 
# - stack trace
#
# Set this to control number of snapshots kept:
#
MAX_DUMPS=5
#
#
#
PID=$1
DUMP_SUFFIX="dump"`date +%Y-%m-%d_%H%M_%S_p$PID`

function performDump() {
  jstack -l $PID > "${DUMP_SUFFIX}.stack"
  jmap -dump:file=${DUMP_SUFFIX}.hprof,live $PID
}

function cleanDumps() {
  DUMP_FILES=`ls -la dump* | awk '{print $9}' | sort -r`
  let DUMP_FILES_LIMIT=($MAX_DUMPS-1)*2
  COUNT=0
  for DUMP_FILE in $DUMP_FILES
  do
     let COUNT=$COUNT+1
     if [ $COUNT -gt $DUMP_FILES_LIMIT ]
     then
       rm $DUMP_FILE
     fi
  done
}

cleanDumps
performDump