有没有办法连接Profiler OSE JAVA应用程序pod？

Question

• There is memory leak in my spring boot application It was able to take 70 concurrent request at ramup of 5seconds and it works smooth on my local machine

When I did deploy the same application on OSE it created out of memory issue

I was trying to connect java profiling tools to remote OPENSHIFT java pods?

Is there any procedure to collect the heap dump or connect profile tool(jvisualvm) to ose pod?

Answer 1

There are manual ways of collecting the ThreadDump & HeapDump in out of memory situations

1. oc get pods - > List Pods
2. oc rsh pod -> Remote shell to pod
3. "jmap -dump:format=b,file=heap_dump1.hprof 1" -> Running the JMAP command to collect the heap dump
4. "jcmd 1 Thread.print > threaddump.txt" -> Running jcmd to collect the thread dump
5. oc volume dc/yourApp --add --claim-size 512M --mount-path --name downloads -> Creating the persistent volumes

After connecting the pods manually, explicitly execute the commands on the ose terminal 3 & 4 Till the application reaches the OOM & because of dump on the persistent volume logs will not be cleared

6. Copy the heapDump files & threadDump files from OSE pod to Local fileSystem after zipping them by "tar"

oc rsync