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From "Sree Panchajanyam D (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (AMQ-3725) Kahadb error during SAN failover delayed write - Allow kahaDB to recover in a similar manner as the JDBC store using the IOExceptionHandler
Date Tue, 28 Aug 2012 08:39:08 GMT

    [ https://issues.apache.org/jira/browse/AMQ-3725?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13443030#comment-13443030
] 

Sree Panchajanyam D commented on AMQ-3725:
------------------------------------------

We have implemented a GFS based solution with i/o fencing (also called disk fencing). I/O
fencing is used to avoid this "split brain" scenario where both active and passive servers
write to the disk.

"One server cannot see changes made by the other if not remounting manually." . Could you
please make this sentence more clear?
                
> Kahadb error during SAN failover delayed write - Allow kahaDB to recover in a similar
manner as the JDBC store using the IOExceptionHandler
> -------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: AMQ-3725
>                 URL: https://issues.apache.org/jira/browse/AMQ-3725
>             Project: ActiveMQ
>          Issue Type: Bug
>          Components: Message Store
>    Affects Versions: 5.5.1
>            Reporter: Jason Sherman
>             Fix For: 5.7.0
>
>
> An issue can arise that causes the broker to terminate when using kahaDB with a SAN,
when the SAN fails over.  In this case the failover process is seamless however, on fail back
there is a 2-3 sec delay where writes are blocked and the broker terminates.  With the JDBC
datastore a similar situation can be handled by using the IOExceptionHandler.  However with
kahaDB, when this same IOExceptionHandler is added it prevents the broker from terminating
but kahaDB retains an invalid index.
> {code}
>  INFO | ActiveMQ JMS Message Broker (Broker1, ID:macbookpro-251a.home-56915-1328715089252-0:1)
started
>  INFO | jetty-7.1.6.v20100715
>  INFO | ActiveMQ WebConsole initialized.
>  INFO | Initializing Spring FrameworkServlet 'dispatcher'
>  INFO | ActiveMQ Console at http://0.0.0.0:8161/admin
>  INFO | ActiveMQ Web Demos at http://0.0.0.0:8161/demo
>  INFO | RESTful file access application at http://0.0.0.0:8161/fileserver
>  INFO | FUSE Web Console at http://0.0.0.0:8161/console
>  INFO | Started SelectChannelConnector@0.0.0.0:8161
> ERROR | KahaDB failed to store to Journal
> java.io.SyncFailedException: sync failed
> 	at java.io.FileDescriptor.sync(Native Method)
> 	at org.apache.kahadb.journal.DataFileAppender.processQueue(DataFileAppender.java:382)
> 	at org.apache.kahadb.journal.DataFileAppender$2.run(DataFileAppender.java:203)
>  INFO | Ignoring IO exception, java.io.SyncFailedException: sync failed
> java.io.SyncFailedException: sync failed
> 	at java.io.FileDescriptor.sync(Native Method)
> 	at org.apache.kahadb.journal.DataFileAppender.processQueue(DataFileAppender.java:382)
> 	at org.apache.kahadb.journal.DataFileAppender$2.run(DataFileAppender.java:203)
> ERROR | Checkpoint failed
> java.io.SyncFailedException: sync failed
> 	at java.io.FileDescriptor.sync(Native Method)
> 	at org.apache.kahadb.journal.DataFileAppender.processQueue(DataFileAppender.java:382)
> 	at org.apache.kahadb.journal.DataFileAppender$2.run(DataFileAppender.java:203)
>  INFO | Ignoring IO exception, java.io.SyncFailedException: sync failed
> java.io.SyncFailedException: sync failed
> 	at java.io.FileDescriptor.sync(Native Method)
> 	at org.apache.kahadb.journal.DataFileAppender.processQueue(DataFileAppender.java:382)
> 	at org.apache.kahadb.journal.DataFileAppender$2.run(DataFileAppender.java:203)
> ERROR | KahaDB failed to store to Journal
> java.io.FileNotFoundException: /Volumes/NAS-01/data/kahadb/db-1.log (No such file or
directory)
> 	at java.io.RandomAccessFile.open(Native Method)
> 	at java.io.RandomAccessFile.<init>(RandomAccessFile.java:216)
> 	at org.apache.kahadb.journal.DataFile.openRandomAccessFile(DataFile.java:70)
> 	at org.apache.kahadb.journal.DataFileAppender.processQueue(DataFileAppender.java:324)
> 	at org.apache.kahadb.journal.DataFileAppender$2.run(DataFileAppender.java:203)
>  INFO | Ignoring IO exception, java.io.FileNotFoundException: /Volumes/NAS-01/data/kahadb/db-1.log
(No such file or directory)
> java.io.FileNotFoundException: /Volumes/NAS-01/data/kahadb/db-1.log (No such file or
directory)
> 	at java.io.RandomAccessFile.open(Native Method)
> 	at java.io.RandomAccessFile.<init>(RandomAccessFile.java:216)
> 	at org.apache.kahadb.journal.DataFile.openRandomAccessFile(DataFile.java:70)
> 	at org.apache.kahadb.journal.DataFileAppender.processQueue(DataFileAppender.java:324)
> 	at org.apache.kahadb.journal.DataFileAppender$2.run(DataFileAppender.java:203)
> ERROR | KahaDB failed to store to Journal
> java.io.FileNotFoundException: /Volumes/NAS-01/data/kahadb/db-1.log (No such file or
directory)
> 	at java.io.RandomAccessFile.open(Native Method)
> 	at java.io.RandomAccessFile.<init>(RandomAccessFile.java:216)
> 	at org.apache.kahadb.journal.DataFile.openRandomAccessFile(DataFile.java:70)
> 	at org.apache.kahadb.journal.DataFileAppender.processQueue(DataFileAppender.java:324)
> 	at org.apache.kahadb.journal.DataFileAppender$2.run(DataFileAppender.java:203)
>  INFO | Ignoring IO exception, java.io.FileNotFoundException: /Volumes/NAS-01/data/kahadb/db-1.log
(No such file or directory)
> java.io.FileNotFoundException: /Volumes/NAS-01/data/kahadb/db-1.log (No such file or
directory)
> 	at java.io.RandomAccessFile.open(Native Method)
> 	at java.io.RandomAccessFile.<init>(RandomAccessFile.java:216)
> 	at org.apache.kahadb.journal.DataFile.openRandomAccessFile(DataFile.java:70)
> 	at org.apache.kahadb.journal.DataFileAppender.processQueue(DataFileAppender.java:324)
> 	at org.apache.kahadb.journal.DataFileAppender$2.run(DataFileAppender.java:203)
>  WARN | Transport failed: java.io.EOFException
>  WARN | Transport failed: java.io.EOFException
>  INFO | KahaDB: Recovering checkpoint thread after death
> ERROR | Checkpoint failed
> java.io.IOException: Input/output error
> 	at java.io.RandomAccessFile.write(Native Method)
> 	at java.io.RandomAccessFile.writeLong(RandomAccessFile.java:1001)
> 	at org.apache.kahadb.page.PageFile.writeBatch(PageFile.java:1006)
> 	at org.apache.kahadb.page.PageFile.flush(PageFile.java:484)
> 	at org.apache.activemq.store.kahadb.MessageDatabase.checkpointUpdate(MessageDatabase.java:1290)
> 	at org.apache.activemq.store.kahadb.MessageDatabase$10.execute(MessageDatabase.java:768)
> 	at org.apache.kahadb.page.Transaction.execute(Transaction.java:760)
> 	at org.apache.activemq.store.kahadb.MessageDatabase.checkpointCleanup(MessageDatabase.java:766)
> 	at org.apache.activemq.store.kahadb.MessageDatabase$3.run(MessageDatabase.java:315)
>  INFO | Ignoring IO exception, java.io.IOException: Input/output error
> java.io.IOException: Input/output error
> 	at java.io.RandomAccessFile.write(Native Method)
> 	at java.io.RandomAccessFile.writeLong(RandomAccessFile.java:1001)
> 	at org.apache.kahadb.page.PageFile.writeBatch(PageFile.java:1006)
> 	at org.apache.kahadb.page.PageFile.flush(PageFile.java:484)
> 	at org.apache.activemq.store.kahadb.MessageDatabase.checkpointUpdate(MessageDatabase.java:1290)
> 	at org.apache.activemq.store.kahadb.MessageDatabase$10.execute(MessageDatabase.java:768)
> 	at org.apache.kahadb.page.Transaction.execute(Transaction.java:760)
> 	at org.apache.activemq.store.kahadb.MessageDatabase.checkpointCleanup(MessageDatabase.java:766)
> 	at org.apache.activemq.store.kahadb.MessageDatabase$3.run(MessageDatabase.java:315)
>  INFO | KahaDB: Recovering checkpoint thread after death
> ERROR | Checkpoint failed
> java.io.IOException: Input/output error
> 	at java.io.RandomAccessFile.write(Native Method)
> 	at java.io.RandomAccessFile.writeLong(RandomAccessFile.java:1001)
> 	at org.apache.kahadb.page.PageFile.writeBatch(PageFile.java:1006)
> 	at org.apache.kahadb.page.PageFile.flush(PageFile.java:484)
> 	at org.apache.activemq.store.kahadb.MessageDatabase.checkpointUpdate(MessageDatabase.java:1290)
> 	at org.apache.activemq.store.kahadb.MessageDatabase$10.execute(MessageDatabase.java:768)
> 	at org.apache.kahadb.page.Transaction.execute(Transaction.java:760)
> 	at org.apache.activemq.store.kahadb.MessageDatabase.checkpointCleanup(MessageDatabase.java:766)
> 	at org.apache.activemq.store.kahadb.MessageDatabase$3.run(MessageDatabase.java:315)
>  INFO | Ignoring IO exception, java.io.IOException: Input/output error
> java.io.IOException: Input/output error
> 	at java.io.RandomAccessFile.write(Native Method)
> 	at java.io.RandomAccessFile.writeLong(RandomAccessFile.java:1001)
> 	at org.apache.kahadb.page.PageFile.writeBatch(PageFile.java:1006)
> 	at org.apache.kahadb.page.PageFile.flush(PageFile.java:484)
> 	at org.apache.activemq.store.kahadb.MessageDatabase.checkpointUpdate(MessageDatabase.java:1290)
> 	at org.apache.activemq.store.kahadb.MessageDatabase$10.execute(MessageDatabase.java:768)
> 	at org.apache.kahadb.page.Transaction.execute(Transaction.java:760)
> 	at org.apache.activemq.store.kahadb.MessageDatabase.checkpointCleanup(MessageDatabase.java:766)
> 	at org.apache.activemq.store.kahadb.MessageDatabase$3.run(MessageDatabase.java:315)
>  WARN | Transport failed: java.io.EOFException
> {code}

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