kubernetes - jmap in kubectl debug container returns immediately; heap dump file is missing

I'm trying to get a Java heap dump out of a GKE container.

First I connect to the container:

kubectl debug -it my-pod --image adoptopenjdk/openjdk11:latest --target=my-container -- bash

Then I run:

jmap -dump:live,format=b,file=heap_dump.hprof <pid of my java program>

The program returns instantly, having outputted:

Heap dump file created

However there is no file to be found.

I'm trying to get a Java heap dump out of a GKE container.

First I connect to the container:

kubectl debug -it my-pod --image adoptopenjdk/openjdk11:latest --target=my-container -- bash

Then I run:

jmap -dump:live,format=b,file=heap_dump.hprof <pid of my java program>

The program returns instantly, having outputted:

Heap dump file created

However there is no file to be found.

Share Improve this question asked 1 hour ago Carl Patenaude Poulin 6,5895 gold badges29 silver badges55 bronze badges

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1 Answer 1

Sorted by: Reset to default 0

jmap creates the heap dump file in the file system of the original container, found at /proc/1/root.