JVM heap dump without trace information: "Unresolved Name"

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There is a memory issue on our production environment. We're running under OpenJDK 14.0.1+7 with -XX:+HeapDumpOnOutOfMemoryError I've loaded created hprof file into Eclipse Memory Analyzer it shows some problems but without class names information in the report, just shows "Unresolved Name" enter image description here enter image description here

I've tried to analyze dump with Java Mission Control but it also shows report without class names.

Both JMC and Eclipse MAT was running with the same version of java 14.0.1+7 under which the dump was created.

I've not found any info about this problem on the internet just one link here. I've tried to use different JVMs for MAT and JMC but without success. It looks very strange.

Does anybody know is this problem related with the created dump? How can I avoid this and see the real class names?

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