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From "Ian Boston (JIRA)" <j...@apache.org>
Subject [jira] Commented: (JCR-929) Under Heavy load in a Cluster HTTP Threads Block and stall requests
Date Fri, 25 May 2007 16:22:16 GMT

    [ https://issues.apache.org/jira/browse/JCR-929?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12499138
] 

Ian Boston commented on JCR-929:
--------------------------------



The thread that is in the Abstract Journal aquired a lock in the LockManagerImpl at about
line 313 (1.3 TAG in svn) and then went into AbsracctJournal.lockAndSync via the cluster node.

All the other threads are waiting for this lock to be released prior to continuing, this is
ok,

since there are no other threads waiting, I can only think that something is not releasing
the journal lock in AbscractJournal (thankfully these are singletons !)

> Under Heavy load in a Cluster HTTP Threads Block and stall requests
> -------------------------------------------------------------------
>
>                 Key: JCR-929
>                 URL: https://issues.apache.org/jira/browse/JCR-929
>             Project: Jackrabbit
>          Issue Type: Bug
>          Components: core
>    Affects Versions: 1.3
>         Environment: 2 Node Cluster, OSX, JDK 1.5 with DatabaseJournal, DatabasePersistanceManager,
all content in DB, using WebDAV to load
>            Reporter: Ian Boston
>         Assigned To: Dominique Pfister
>
> Under Heavy load created by mounting both nodes in the cluster in OSX Finder and then
uploading large numebers of files to each node at the same time ( a few 1000), eventually
one of the nodes stops responding and the Finder mount timesout and disconnects.
> Once that happens that node becomes unusable.
> More mount attempts will prompt for a password indicating HTTP is still running, but
will timeout once the connection is authenticated.
> Access by the Web Browser will prompt for a password, conenct and provide a once only
listing of any collection in the workspace. If you try to refresh that collection, the HTTP
request hangs forever.

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