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Editorial Team
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Asked: 2026-05-17T14:54:18+00:00

I am using SOLR for indexing documents in my web application and solr.war is

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I am using SOLR for indexing documents in my web application and solr.war is deployed on the jboss server.
But while indexing i am getting too many files open exception. Below is some of exceptions stack trace:

12:31:33,267 ERROR [STDERR] Exception in thread "Lucene Merge Thread #0"
12:31:33,267 ERROR [STDERR] org.apache.lucene.index.MergePolicy$MergeException: java.io.FileNotFoundException: /data/jbossesb/bin/solr/data/index/_2rw.prx (Too many open files)
12:31:33,267 ERROR [STDERR] at org.apache.lucene.index.ConcurrentMergeScheduler.handleMergeException(ConcurrentMergeScheduler.java:351)
12:31:33,267 ERROR [STDERR] at org.apache.lucene.index.ConcurrentMergeScheduler$MergeThread.run(ConcurrentMergeScheduler.java:315)
12:31:33,267 ERROR [STDERR] Caused by: java.io.FileNotFoundException: /data/jbossesb/bin/solr/data/index/_2rw.prx (Too many open files)
12:31:33,267 ERROR [STDERR] at java.io.RandomAccessFile.open(Native Method)
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1 Answer

  1. Editorial Team

    File Descriptor will be your most likely cause.

    Check the limit which your operating system has set. and adjust accordingliy.
    on Unix, the command to view and set is ulimit.

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