Script collect threaddumps from the Java process

Usage: "Usage: jstackSeries <process identfier> [ <count> [ <delay> [ <sample count> [ <file prefix> [ <folder> ] ] ] ] ]

Where:

process identfier is prosess id or if it is not a number then script is trying to find pid by ps -ef|grep java| grep <process identifier>
count how many times we take samples, use -1 if no limit.
delay wait between samples
sample count how many threadump samples we take on row
file prefix what is the file prefix, this can be example server name
folder where to write thread dump files

 #!/bin/bash
 if [ $# -eq 0 ]; then
     echo >&2 "Usage: jstackseries.sh <process identfier> [ <count> [ <delay> [ <sample count> [ <file prefix> [ <folder> ] ] ] ] ]"
     echo >&2 "    Defaults: count = 10 (-1 eternal), delay = 0.5 (seconds), series count = 1, file prefix=jstack, folder="
     exit 1
 fi
 
 pid=$1          # can be a pid, if is not then grep java|grep <process identifier> is used to find correct pid
 count=${2:-10}  # defaults to 10 times
 delay=${3:-0.5} # defaults to 0.5 seconds
 samplecount=${4:-1}
 fileprefix=${5:-"jstack"}
 folder=${6:-"log"}

 if [ ! -d "$folder" ]; then
    mkdir $folder
 fi
 

 counter=1
 eternal=0
 
 if [ $count -lt 0 ]; then
     let eternal=1
 fi
 
 while [[ $count -gt 0 || $eternal -eq 1 ]]; do
     scount=$samplecount
     
     while [ $scount -gt 0 ]; do
       
       datefolder=$(date +%F)T.$(date +%H)
     
       if [ ! -d "$folder/$datefolder" ]; then
         mkdir $folder/$datefolder
       fi
 
       printf -v counterstr "%06d" $counter
       
       pid2=$pid
 
       if ! [[ $pid =~ '^[0-9]+$' ]] ; then 
           pid2=$(ps -ef | grep $pid | grep java | awk '{print $2}')
       fi
 
       jstack -l $pid2 > $folder/$datefolder/$fileprefix.$pid2.$counterstr.$(date +%H%M%S).log
#      All the threaddumps to same file below      
#      jstack -l $pid2 >> $folder/$datefolder/$fileprefix.$pid2.log       
       let scount--
       let counter++
       echo -n "."
     done 
     if [ $eternal -eq 0 ]; then
       let count--
     fi
     if [ $count -gt 0 ] || [ $eternal -eq 1 ]; then
       sleep $delay
     fi
 done
echo

sammso/jstackseries.md

Script collect threaddumps from the Java process