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Posted to solr-user@lucene.apache.org by Harish Agarwal <ha...@gmail.com> on 2014/03/25 22:25:11 UTC

Memory Problems + java.lang.ref.Finalizer

In reference to my prior thread:

http://mail-archives.apache.org/mod_mbox/lucene-solr-user/201403.mbox/%3CCAC-cpvrzBHizOMCDhkRHYgQiZgueRNTkwtkxWWX3j1RqcXEQZw@mail.gmail.com%3E

I followed the advice to set unmap=false on my indexes with promising
results.  Without performing any index updates I am seeing very stable
memory usage and GC performance.  However, I'm still sporadically seeing
memory problems after replicating index updates.  After performing another
heap dump, I noticed that:

java.lang.ref.Finalizer

is occupying an inordinate amount of space.  jmap reports it as an
'unreachable object', however GC was obviously not cleaning it up.

I'm really not sure how to hunt down this problem, any help would be
appreciated.

-Harish