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From "shou aoki (JIRA)" <j...@apache.org>
Subject [jira] [Created] (SOLR-3924) The solr weakness fault tolerance on ext4
Date Wed, 10 Oct 2012 08:31:02 GMT
shou aoki created SOLR-3924:
-------------------------------

             Summary: The solr weakness fault tolerance on ext4
                 Key: SOLR-3924
                 URL: https://issues.apache.org/jira/browse/SOLR-3924
             Project: Solr
          Issue Type: Bug
    Affects Versions: 3.5
         Environment: Ubuntu 12.04 LTS, Filesystem is ext4.
            Reporter: shou aoki


In few days ago ours machine (with solr) was crashed.
We rebooted machine and solr, The solr looks like validly behavior.
But, The solr is not valid because following : 
- Exists Solr core.
- Exists /tmp/solr directory and /tmp/solr/data/solr_core directory.
- Exists /tmp/solr/solr.xml and wrote solr/cores/core tag.
- We can start Solr Server without exception.
- "$ curl http://localhost:8983/solr/solr_core/select?" *returns 404 Not Found.*
  
And I found the file of '/tmp/solr/data/solr_core/index/segments.gen' is empty file.
So, I think there is no (or weak) fault tolerance about Solr.

I hope the solr grow up crash-free server.
For example, File handling is atomically as much as possible.

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