I have a question regarding the permissions set for generated heap dumps.

I have some Jetty servers running on Linux (Java 6 64 bit / Java 7 64 bit) with the following Java arguments:

-XX:+HeapDumpOnOutOfMemoryError

-XX:HeapDumpPath=/opt/apps/heapdump

When there is a out-of-memory exception a heap dump is automatically generated by the JVM. But it seems that the heap dump permisions are set to read-write for owner only (600).

When I create files then they have by default read-write for owner and group/all read access (644).

$ ls -l

total 795432

-rw------- 1 bamboop bamboo 811322265 Apr 14 09:18 java_pid337.hprof

-rw-r--r-- 1 bamboop bamboo         6 Apr 14 12:57 test

Here the umask set for the server running the Java processes

$ umask 

0022

Regards

Walter