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From "Flavio Junqueira (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (BOOKKEEPER-212) Bookie stops responding when creating and deleting many ledgers
Date Fri, 06 Apr 2012 12:51:24 GMT

     [ https://issues.apache.org/jira/browse/BOOKKEEPER-212?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Flavio Junqueira updated BOOKKEEPER-212:
----------------------------------------

    Fix Version/s: 4.1.0
    
> Bookie stops responding when creating and deleting many ledgers
> ---------------------------------------------------------------
>
>                 Key: BOOKKEEPER-212
>                 URL: https://issues.apache.org/jira/browse/BOOKKEEPER-212
>             Project: Bookkeeper
>          Issue Type: Bug
>            Reporter: Flavio Junqueira
>            Priority: Blocker
>             Fix For: 4.1.0
>
>
> I have written down a short app to try to reproduce one problematic case reported on
the user list. The app does the following:
> # It creates initially a number of ledgers, say 2000;
> # Once it reaches 2000, for each new ledger it creates, it deletes the one at the head
of the list;
> # Before closing the ledger, it adds 5 entries of 1k, just to generate some traffic for
any given ledger.
> What I tried to achieve is to have thousands of active ledgers and delete new ledgers
as I create new ones. I'll post a link to my test code later. 
> At some point, one bookie stops responding. The bookie seems to be up, but it is not
responsive. Looking at the logs, this is what I see:
> {noformat}
> 2012-04-06 12:22:05,765 - INFO  [SyncThread:LedgerCacheImpl@682] - Ledger 1726 is evicted
from file info cache.
> 2012-04-06 12:22:05,769 - INFO  [NIOServerFactory-3181:LedgerCacheImpl@682] - Ledger
1727 is evicted from file info cache.
> 2012-04-06 12:22:05,772 - INFO  [SyncThread:LedgerCacheImpl@682] - Ledger 1728 is evicted
from file info cache.
> 2012-04-06 12:22:05,780 - INFO  [NIOServerFactory-3181:LedgerCacheImpl@682] - Ledger
1729 is evicted from file info cache.
> 2012-04-06 12:22:05,787 - INFO  [NIOServerFactory-3181:LedgerCacheImpl@682] - Ledger
1730 is evicted from file info cache.
> 2012-04-06 12:22:05,794 - INFO  [NIOServerFactory-3181:LedgerCacheImpl@682] - Ledger
1731 is evicted from file info cache.
> 2012-04-06 12:22:05,801 - INFO  [NIOServerFactory-3181:LedgerCacheImpl@682] - Ledger
1732 is evicted from file info cache.
> 2012-04-06 12:22:05,807 - INFO  [NIOServerFactory-3181:LedgerCacheImpl@682] - Ledger
1733 is evicted from file info cache.
> 2012-04-06 12:22:05,822 - INFO  [NIOServerFactory-3181:LedgerCacheImpl@682] - Ledger
1734 is evicted from file info cache.
> 2012-04-06 12:22:05,828 - INFO  [NIOServerFactory-3181:LedgerCacheImpl@682] - Ledger
1735 is evicted from file info cache.
> 2012-04-06 12:22:05,842 - INFO  [NIOServerFactory-3181:LedgerCacheImpl@682] - Ledger
1736 is evicted from file info cache.
> 2012-04-06 12:22:05,851 - INFO  [NIOServerFactory-3181:LedgerCacheImpl@682] - Ledger
1737 is evicted from file info cache.
> 2012-04-06 12:22:05,856 - INFO  [NIOServerFactory-3181:LedgerCacheImpl@682] - Ledger
1738 is evicted from file info cache.
> 2012-04-06 12:22:05,864 - INFO  [NIOServerFactory-3181:LedgerCacheImpl@682] - Ledger
1739 is evicted from file info cache.
> 2012-04-06 12:22:05,874 - INFO  [NIOServerFactory-3181:LedgerCacheImpl@682] - Ledger
1740 is evicted from file info cache.
> 2012-04-06 12:22:05,885 - INFO  [NIOServerFactory-3181:LedgerCacheImpl@682] - Ledger
1741 is evicted from file info cache.
> 2012-04-06 12:22:05,894 - INFO  [NIOServerFactory-3181:LedgerCacheImpl@682] - Ledger
1742 is evicted from file info cache.
> 2012-04-06 12:22:05,902 - INFO  [NIOServerFactory-3181:LedgerCacheImpl@682] - Ledger
1743 is evicted from file info cache.
> 2012-04-06 12:22:05,987 - INFO  [GarbageCollectorThread:LedgerCacheImpl@682] - Ledger
1744 is evicted from file info cache.
> 2012-04-06 12:22:05,987 - ERROR [GarbageCollectorThread:GarbageCollectorThread$1@244]
- Exception when deleting the ledger index file on the Bookie: 
> java.io.IOException: /home/fpj/bk/current/1/b/10b.idx not found
>         at org.apache.bookkeeper.bookie.FileInfo.checkOpen(FileInfo.java:118)
>         at org.apache.bookkeeper.bookie.FileInfo.close(FileInfo.java:194) 
>         at org.apache.bookkeeper.bookie.LedgerCacheImpl.deleteLedger(LedgerCacheImpl.java:619)

>         at org.apache.bookkeeper.bookie.GarbageCollectorThread$1.gc(GarbageCollectorThread.java:242)
>         at org.apache.bookkeeper.meta.AbstractZkLedgerManager.doGc(AbstractZkLedgerManager.java:274)
>         at org.apache.bookkeeper.meta.FlatLedgerManager.garbageCollectLedgers(FlatLedgerManager.java:168)
>         at org.apache.bookkeeper.bookie.GarbageCollectorThread.doGcLedgers(GarbageCollectorThread.java:237)
>         at org.apache.bookkeeper.bookie.GarbageCollectorThread.run(GarbageCollectorThread.java:206)

> 2012-04-06 12:22:05,987 - INFO  [GarbageCollectorThread:LedgerCacheImpl@682] - Ledger
1745 is evicted from file info cache.
> {noformat}
> There are lots of exceptions like that, but otherwise I don't see anything that could
make the bookie unresponsive. I'll upload the logs as well.   

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