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From "Ian Maloney (JIRA)" <j...@apache.org>
Subject [jira] [Created] (DRILL-4268) Possible resource leak leading to SocketException: Too many open files
Date Tue, 12 Jan 2016 19:00:40 GMT
Ian Maloney created DRILL-4268:
----------------------------------

             Summary: Possible resource leak leading to SocketException: Too many open files
                 Key: DRILL-4268
                 URL: https://issues.apache.org/jira/browse/DRILL-4268
             Project: Apache Drill
          Issue Type: Bug
    Affects Versions: 1.2.0
         Environment: RHEL 6 running against Hive storage type
            Reporter: Ian Maloney


I have a java app accessing Drill 1.2 via JDBC, which runs 100s of counts on various tables.
No concurrency is being used. The JDBC URL uses the format: 
jdbc:drill:drillbit=a-bits-hostname

Hanifi suggested I check for open file descriptors using: 
lsof -a -p DRILL_PID | wc -l

which I did on the two nodes, I currently have running drill, both, before and
after restarting.

Node from JDBC connection string (which had been previously restarted):
   Before: 396
   After: 396
Other node:
   Before: 14
   After: 395

The error, "Too many open files", persists after restarting the bits.

Opened as a result of this thread:
http://mail-archives.apache.org/mod_mbox/drill-user/201601.mbox/browser



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