Hystrix threadpool is going on waiting state till timeout on ZGC activity

Hello Ram ,

Thanks for reply , My heap size is 31GBs. ZGC pause time is less than 2 ms in everycase (less than 1 ms in the most of cases) still my hystrix thread pool is getting timedout on 3 secs timeout .

Hello Sajal! 

 I did review the GC log. There doesn't seem to be a problem with GC activities. You have excellent GC throughput 99.999%. I suspect hysterix threads are pausing due to some other reason? May there is a 

• Threads getting BLOCKED
• Network connectivity
• Load balancer routing issue
• Heavy CPU consumption of threads
• Operating System running with old patches
• DB not responding properly
• :

 May be you want to capture thread dump and do the analysis. Even better you can using the open source yCrash script which will capture 360-degree application level artifacts (like GC logs, 3 snapshots of thread dumps, heap dumps) and system level artifacts (like top, top -H, netstat, vmstat, iostat, dmesg, diskusage, kernel parameters...). Once you have these data, either you can manually analyze them or upload it to yCrash tool, which will analyze all these artifacts and generate root cause analysis report. It has potential to indicate the root cause of the problem.