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https://issues.apache.org/jira/browse/ZOOKEEPER-486?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12784717#action_12784717
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Flavio Paiva Junqueira commented on ZOOKEEPER-486:
--------------------------------------------------
Here is the log output for the failing test:
{noformat}
2009-12-02 09:46:22,952 - INFO - [main:bookieclientt...@198] - Starting no
ledger test
2009-12-02 09:46:22,956 - INFO - [Thread-4:bookieclienttes...@75] - Capacity
16, 0
2009-12-02 09:46:22,957 - INFO - [Thread-4:bookieclienttes...@83] - Received 0
2009-12-02 09:46:23,001 - ERROR - [SyncThread:bookie$lastlogm...@295] -
Problems writing to
/var/folders/iq/iqmyL+XiGjqE2AjRkKTe-E+++TI/-Tmp-/bookie2550661167481866393test/lastMark
java.io.FileNotFoundException:
/var/folders/iq/iqmyL+XiGjqE2AjRkKTe-E+++TI/-Tmp-/bookie2550661167481866393test/lastMark
(No such file or directory)
at java.io.FileOutputStream.open(Native Method)
at java.io.FileOutputStream.<init>(FileOutputStream.java:179)
at java.io.FileOutputStream.<init>(FileOutputStream.java:131)
at
org.apache.bookkeeper.bookie.Bookie$LastLogMark.rollLog(Bookie.java:290)
at org.apache.bookkeeper.bookie.Bookie$SyncThread.run(Bookie.java:116)
2009-12-02 09:46:23,002 - FATAL - [Thread-3:boo...@375] - Bookie thread exiting
java.lang.InterruptedException
at
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.reportInterruptAfterWait(AbstractQueuedSynchronizer.java:1899)
at
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1934)
at
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:358)
at org.apache.bookkeeper.bookie.Bookie.run(Bookie.java:341)
{noformat}
and the assert statement that fails:
{noformat}
Testcase: testNoLedger took 0.132 sec
FAILED
expected:<1> but was:<2>
junit.framework.AssertionFailedError: expected:<1> but was:<2>
at
org.apache.bookkeeper.test.BookieClientTest.testNoLedger(BookieClientTest.java:204)
{noformat}
It seems to me that the problem is that the bookie is not processing the
FileNotFoundException properly. It should send a ENOLEDGER value back.
> Improve bookie performance for large number of ledgers
> ------------------------------------------------------
>
> Key: ZOOKEEPER-486
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-486
> Project: Zookeeper
> Issue Type: Improvement
> Components: contrib-bookkeeper
> Reporter: Flavio Paiva Junqueira
> Assignee: Benjamin Reed
> Attachments: ZOOKEEPER-486.patch
>
>
> If we write simultaneously to a large number of ledgers on a bookie, then
> performance drops significantly due to more seeks on the ledger device. In
> such cases, we should be clustering ledgers into files to reduce the number
> of seeks, and performing sequential writes on each file. Clustering ledgers
> will impact read performance, so we would to have a knob to control such a
> feature.
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