In case of OOM, user can pass the options
-XX:HeapDumpOnOutOfMemoryError
-XX:HeapDumpPath

https://docs.oracle.com/javase/8/docs/technotes/guides/troubleshoot/clopts001.html

However, the HeapDumpPath provides an option to only provide directory path.
This generates the file with format java_pid$pid.hprof

It may be better to provide an option of supplying formatted file name from
command line which includes option of providing date/timestamp in file name,
e.g., -XXHeapDumpFileName=java_pid_yyMMddHHmmss.hprof, which should generate
a file name like java_2433_180608140139.hprof.