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Posted to oak-issues@jackrabbit.apache.org by "Marcel Reutegger (JIRA)" <ji...@apache.org> on 2013/11/07 11:00:19 UTC

[jira] [Created] (OAK-1154) MongoMK throws exception when there are many listeners

Marcel Reutegger created OAK-1154:
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             Summary: MongoMK throws exception when there are many listeners
                 Key: OAK-1154
                 URL: https://issues.apache.org/jira/browse/OAK-1154
             Project: Jackrabbit Oak
          Issue Type: Bug
          Components: core, mongomk
            Reporter: Marcel Reutegger


Per default MongoMK uses up to 10 connections to communicate with MongoDB. With the recent changes to the observation implementation in Oak it may happen that many threads try to read from MongoMK at the same time. This may lead to an exception:

{noformat}
Caused by: com.mongodb.DBPortPool$SemaphoresOut: Out of semaphores to get db connection
{noformat}



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