Our indexserver (Search appliance - Lucene) is constantly crashing.

It crashed several times per day with Filr version 2.. After upgrading to
it is better and we are down to a crash once/twice a week. But still i get exceptions: ... IndexWriter is closed ... and Filr is broken.

Restarting the Search appliance takes a few seconds and 'solves' the problem.

I disabled all fulltext indexing, and recreated the index already several times from scratch. No change, just not stable.

Machine: 16GB RAM, 4 CPU, at the time of the crash no Swap is used and RAM is not exhausted.

Anyone experiencing lucene crashes, too?

PS: With > 1 million files index recreation takes some time and is no fun...