[jira] [Created] (OAK-5995) Lucene indexing with copyonread/write holding unexpectedly much files open

["Dirk Rudolph (JIRA)" <ji...@apache.org>]

Dirk Rudolph created OAK-5995:
---------------------------------

             Summary: Lucene indexing with copyonread/write holding unexpectedly much files open
                 Key: OAK-5995
                 URL: https://issues.apache.org/jira/browse/OAK-5995
             Project: Jackrabbit Oak
          Issue Type: Bug
          Components: indexing
    Affects Versions: 1.4.1
            Reporter: Dirk Rudolph
         Attachments: lsofout2.txt

We recently faced the issue that our Oak based enterprise content management system run into failures due to too much open files. Monitoring the lsof output we found out that most of the opened files of the process are the files within the configured localIndexDir of the LuceneIndexProviderService. 

{code}
enableCopyOnReadSupport="true"
localIndexDir="tmp/index"
enableCopyOnWriteSupport="true"
{code}

See attached the lsof output:

{code}
~ wc -l lsofout2.txt
   20388 lsofout2.txt
~ grep "tmp/index" lsofout2.txt | wc -l
   13499
{code}

where more then 60% of open files are "tmp/index" ones as configured as {{localIndexDir}}. 



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