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From Gary Tully <gary.tu...@gmail.com>
Subject Re: Is there JDBC master/slave retry logic if database goes down?
Date Wed, 08 Apr 2009 19:37:57 GMT
in 5.2 there is a setter on the JDBCPersistenceAdaptor that allows you to
set a locker instance.
see:
http://activemq.apache.org/maven/5.2.0/activemq-core/apidocs/org/apache/activemq/store/jdbc/JDBCPersistenceAdapter.html#setDatabaseLocker(org.apache.activemq.store.jdbc.DatabaseLocker)

Otherwise, yea, as you describe, derive and inject using spring via the XML
configuration.

hope this helps,
Gary.
2009/4/7 magellings <mark.gellings@qg.com>

>
> How do you exactly provide your own implementation?
>
> On the JDBCPersistenceAdaptor the createDatabaseLocker will always use the
> DefaultDatabaseLocker:
>
> protected DatabaseLocker createDatabaseLocker() throws IOException {
>  return new DefaultDatabaseLocker(getLockDataSource(), getStatements());
> }
>
> Can I provide my own implemenation declaratively through configuration
> provided I write a class deriving from JDBCPersistenceAdaptor of which
> overrides the createDatabaseLocker class?
>
>
> Gary Tully wrote:
> >
> > One thing to note: you can provide your own implementation of the
> > org.apache.activemq.store.jdbc.DefaultDatabaseLocker  and implement
> > keepAlive to be aware of your database backup policy.
> >
> > If you go down this route and conceive a better default or optional
> > strategy, feel free to submit it as a patch.
> >
> >
> >
> > 2009/3/11 magellings <mark.gellings@qg.com>
> >
> >>
> >> Well it was butt-simple to get working like the c3p0 documentation said.
> >> I
> >> upped the delay to 20s, unfortunately the master broker still failed.
> >>
> >> I'm kind of wondering how the slave would respond.  My guess is it would
> >> probably time out too.
> >>
> >> Any thoughts?
> >>
> >> See further below for the errors.
> >>
> >>
> >>
> C:\WIP\ActiveMQ\apache-activemq-5.2.0-bin\apache-activemq-5.2.0\bin>activemq.bat
> >> xbean:activemq.xml
> >> ACTIVEMQ_HOME:
> >> C:\WIP\ActiveMQ\apache-activemq-5.2.0-bin\apache-activemq-5.2.0\bin\..
> >> ACTIVEMQ_BASE:
> >> C:\WIP\ActiveMQ\apache-activemq-5.2.0-bin\apache-activemq-5.2.0\bin\..
> >> Loading message broker from: xbean:activemq.xml
> >> INFO  DefaultCamelContext            - JMX enabled. Using
> >> InstrumentationLifecycleStrategy.
> >> INFO  MLog                           - MLog clients using log4j logging.
> >> INFO  C3P0Registry                   - Initializing c3p0-0.9.1.2 [built
> >> 21-May-2007 15:04:56; debug? true; trace: 10]
> >> INFO  AbstractPoolBackedDataSource   - Initializing c3p0 pool...
> >> com.mchange.v2.c3p0.ComboPooledDataSource [ acquireIncrement -> 3,
> >> acquireRetryAttemp
> >> ts -> 30, acquireRetryDelay -> 20000, autoCommitOnClose -> false,
> >> automaticTestTable -> con_test, breakAfterAcquireFailure -> false,
> >> checkoutTimeout -
> >> > 30000, connectionCustomizerClassName -> null,
> connectionTesterClassName
> >> ->
> >> > com.mchange.v2.c3p0.impl.DefaultConnectionTester, dataSourceName ->
> >> 2rvy1
> >> 17z1wqpy2hxzkebp|18105e8, debugUnreturnedConnectionStackTraces -> false,
> >> description -> null, driverClass ->
> >> com.microsoft.sqlserver.jdbc.SQLServerDri
> >> ver, factoryClassLocation -> null, forceIgnoreUnresolvedTransactions ->
> >> false, identityToken -> 2rvy117z1wqpy2hxzkebp|18105e8,
> >> idleConnectionTestPerio
> >> d -> 30, initialPoolSize -> 10, jdbcUrl ->
> >> jdbc:sqlserver://QG076619.qg.com:1433
> >> ;databaseName=activedb;user=sa;password=pa$$word,
> >> maxAdministrativeTas
> >> kTime -> 0, maxConnectionAge -> 0, maxIdleTime -> 30,
> >> maxIdleTimeExcessConnections -> 0, maxPoolSize -> 100, maxStatements ->
> >> 200,
> >> maxStatementsPerCon
> >> nection -> 0, minPoolSize -> 10, numHelperThreads -> 3,
> >> numThreadsAwaitingCheckoutDefaultUser -> 0, preferredTestQuery -> null,
> >> properties -> {user=**
> >> ****, password=******}, propertyCycle -> 0, testConnectionOnCheckin ->
> >> false, testConnectionOnCheckout -> false, unreturnedConnectionTimeout ->
> >> 0,
> >> use
> >> sTraditionalReflectiveProxies -> false ]
> >> INFO  BrokerService                  - Using Persistence Adapter:
> >> JDBCPersistenceAdaptor(com.mchange.v2.c3p0.ComboPooledDataSource [
> >> acquireIncrement
> >> -> 3, acquireRetryAttempts -> 30, acquireRetryDelay -> 20000,
> >> autoCommitOnClose -> false, automaticTestTable -> con_test,
> >> breakAfterAcquireFailure ->
> >> false, checkoutTimeout -> 30000, connectionCustomizerClassName -> null,
> >> connectionTesterClassName ->
> >> com.mchange.v2.c3p0.impl.DefaultConnectionTester,
> >>  dataSourceName -> 2rvy117z1wqpy2hxzkebp|18105e8,
> >> debugUnreturnedConnectionStackTraces -> false, description -> null,
> >> driverClass -> com.microsoft.sql
> >> server.jdbc.SQLServerDriver, factoryClassLocation -> null,
> >> forceIgnoreUnresolvedTransactions -> false, identityToken ->
> >> 2rvy117z1wqpy2hxzkebp|18105e8,
> >>  idleConnectionTestPeriod -> 30, initialPoolSize -> 10, jdbcUrl ->
> >> jdbc:sqlserver://QG076619.qg.com:1433
> >> ;databaseName=activedb;user=sa;password=pa$$wo
> >> rd, maxAdministrativeTaskTime -> 0, maxConnectionAge -> 0, maxIdleTime
> ->
> >> 30, maxIdleTimeExcessConnections -> 0, maxPoolSize -> 100, maxStatements
> >> ->
> >> 200, maxStatementsPerConnection -> 0, minPoolSize -> 10,
> numHelperThreads
> >> ->
> >> 3, numThreadsAwaitingCheckoutDefaultUser -> 0, preferredTestQuery ->
> null
> >> , properties -> {user=******, password=******}, propertyCycle -> 0,
> >> testConnectionOnCheckin -> false, testConnectionOnCheckout -> false,
> >> unreturnedCon
> >> nectionTimeout -> 0, usesTraditionalReflectiveProxies -> false ])
> >> INFO  JDBCPersistenceAdapter         - Database driver recognized:
> >> [microsoft_sql_server_2005_jdbc_driver]
> >> INFO  DefaultDatabaseLocker          - Attempting to acquire the
> >> exclusive
> >> lock to become the Master broker
> >> INFO  DefaultDatabaseLocker          - Becoming the master on
> dataSource:
> >> com.mchange.v2.c3p0.ComboPooledDataSource [ acquireIncrement -> 3,
> >> acquireRe
> >> tryAttempts -> 30, acquireRetryDelay -> 20000, autoCommitOnClose ->
> >> false,
> >> automaticTestTable -> con_test, breakAfterAcquireFailure -> false,
> >> checkout
> >> Timeout -> 30000, connectionCustomizerClassName -> null,
> >> connectionTesterClassName ->
> >> com.mchange.v2.c3p0.impl.DefaultConnectionTester, dataSourceName
> >>  -> 2rvy117z1wqpy2hxzkebp|18105e8, debugUnreturnedConnectionStackTraces
> >> ->
> >> false, description -> null, driverClass ->
> >> com.microsoft.sqlserver.jdbc.SQL
> >> ServerDriver, factoryClassLocation -> null,
> >> forceIgnoreUnresolvedTransactions -> false, identityToken ->
> >> 2rvy117z1wqpy2hxzkebp|18105e8, idleConnection
> >> TestPeriod -> 30, initialPoolSize -> 10, jdbcUrl ->
> >> jdbc:sqlserver://QG076619.qg.com:1433
> >> ;databaseName=activedb;user=sa;password=pa$$word,
> >> maxAdminist
> >> rativeTaskTime -> 0, maxConnectionAge -> 0, maxIdleTime -> 30,
> >> maxIdleTimeExcessConnections -> 0, maxPoolSize -> 100, maxStatements ->
> >> 200,
> >> maxStateme
> >> ntsPerConnection -> 0, minPoolSize -> 10, numHelperThreads -> 3,
> >> numThreadsAwaitingCheckoutDefaultUser -> 0, preferredTestQuery -> null,
> >> properties ->
> >>  {user=******, password=******}, propertyCycle -> 0,
> >> testConnectionOnCheckin
> >> -> false, testConnectionOnCheckout -> false, unreturnedConnectionTimeout
> >> -> 0, usesTraditionalReflectiveProxies -> false ]
> >> INFO  BrokerService                  - ActiveMQ 5.2.0 JMS Message Broker
> >> (master) is starting
> >> INFO  BrokerService                  - For help or more information
> >> please
> >> see: http://activemq.apache.org/
> >> INFO  TransportServerThreadSupport   - Listening for connections at:
> >> tcp://QG076619:61616
> >> INFO  TransportConnector             - Connector openwire Started
> >> INFO  TransportServerThreadSupport   - Listening for connections at:
> >> ssl://QG076619:61617
> >> INFO  TransportConnector             - Connector ssl Started
> >> INFO  TransportServerThreadSupport   - Listening for connections at:
> >> stomp://QG076619:61613
> >> INFO  TransportConnector             - Connector stomp Started
> >> INFO  TransportServerThreadSupport   - Listening for connections at:
> >> xmpp://QG076619:61222
> >> INFO  TransportConnector             - Connector xmpp Started
> >> INFO  BrokerService                  - ActiveMQ JMS Message Broker
> >> (master,
> >> ID:QG076619-3632-1236812198396-0:0) started
> >> INFO  log                            - Logging to
> >> org.slf4j.impl.JCLLoggerAdapter(org.mortbay.log) via
> >> org.mortbay.log.Slf4jLog
> >> INFO  log                            - jetty-6.1.9
> >> INFO  WebConsoleStarter              - ActiveMQ WebConsole initialized.
> >> INFO  /admin                         - Initializing Spring
> >> FrameworkServlet
> >> 'dispatcher'
> >> INFO  log                            - ActiveMQ Console at
> >> http://0.0.0.0:8162/admin
> >> INFO  log                            - ActiveMQ Web Demos at
> >> http://0.0.0.0:8162/demo
> >> INFO  log                            - RESTful file access application
> at
> >> http://0.0.0.0:8162/fileserver
> >> INFO  log                            - Started
> >> SelectChannelConnector@0.0.0.0:8162
> >> WARN  BrokerRegistry                 - Broker localhost not started so
> >> using
> >> master instead
> >> INFO  TransportConnector             - Connector vm://localhost Started
> >>
> >>
> >> Then BOOM!  Although behavior is different.  Now it takes longer to
> stop.
> >> :)  "The connection to '/10.0.1.5:3333' is taking a long time to
> >> shutdown."
> >> If you look closely you can see activeMQ is timing out.
> >>
> >>
> >>
> >>
> >> ERROR DefaultDatabaseLocker          - Failed to update database lock:
> >> com.microsoft.sqlserver.jdbc.SQLServerException: Connection reset by pe
> >> et write error
> >> com.microsoft.sqlserver.jdbc.SQLServerException: Connection reset by
> >> peer:
> >> socket write error
> >>        at
> >> com.microsoft.sqlserver.jdbc.SQLServerConnection.terminate(Unknown
> >> Source)
> >>        at com.microsoft.sqlserver.jdbc.TDSChannel.write(Unknown Source)
> >>        at com.microsoft.sqlserver.jdbc.TDSWriter.flush(Unknown Source)
> >>        at com.microsoft.sqlserver.jdbc.TDSWriter.writePacket(Unknown
> >> Source)
> >>        at com.microsoft.sqlserver.jdbc.TDSWriter.endMessage(Unknown
> >> Source)
> >>        at com.microsoft.sqlserver.jdbc.TDSCommand.startResponse(Unknown
> >> Source)
> >>        at
> >>
> >>
> com.microsoft.sqlserver.jdbc.SQLServerPreparedStatement.doExecutePreparedStatement(Unknown
> >> Source)
> >>        at
> >>
> >>
> com.microsoft.sqlserver.jdbc.SQLServerPreparedStatement$PrepStmtExecCmd.doExecute(Unknown
> >> Source)
> >>        at com.microsoft.sqlserver.jdbc.TDSCommand.execute(Unknown
> Source)
> >>        at
> >> com.microsoft.sqlserver.jdbc.SQLServerConnection.executeCommand(Unknown
> >> Source)
> >>        at
> >> com.microsoft.sqlserver.jdbc.SQLServerStatement.executeCommand(Unknown
> >> Source)
> >>        at
> >> com.microsoft.sqlserver.jdbc.SQLServerStatement.executeStatement(Unknown
> >> Source)
> >>        at
> >>
> >>
> com.microsoft.sqlserver.jdbc.SQLServerPreparedStatement.executeUpdate(Unknown
> >> Source)
> >>        at
> >>
> >>
> com.mchange.v2.c3p0.impl.NewProxyPreparedStatement.executeUpdate(NewProxyPreparedStatement.java:105)
> >>        at
> >>
> >>
> org.apache.activemq.store.jdbc.DefaultDatabaseLocker.keepAlive(DefaultDatabaseLocker.java:118)
> >>        at
> >>
> >>
> org.apache.activemq.store.jdbc.JDBCPersistenceAdapter.databaseLockKeepAlive(JDBCPersistenceAdapter.java:481)
> >>        at
> >>
> >>
> org.apache.activemq.store.jdbc.JDBCPersistenceAdapter$1.run(JDBCPersistenceAdapter.java:183)
> >>        at
> >> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
> >>        at
> >>
> java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:317)
> >>        at
> >> java.util.concurrent.FutureTask.runAndReset(FutureTask.java:150)
> >>        at
> >>
> >>
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$101(ScheduledThreadPoolExecutor.java:98)
> >>        at
> >>
> >>
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.runPeriodic(ScheduledThreadPoolExecutor.java:181)
> >>        at
> >>
> >>
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:205)
> >>        at
> >>
> >>
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
> >>        at
> >>
> >>
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
> >>        at java.lang.Thread.run(Thread.java:619)
> >> INFO  GooGooStatementCache           - Problem with checked-in
> Statement,
> >> discarding.
> >> com.microsoft.sqlserver.jdbc.SQLServerException: The connection is
> >> closed.
> >>        at
> >>
> com.microsoft.sqlserver.jdbc.SQLServerException.makeFromDriverError(Unknown
> >> Source)
> >>        at
> >> com.microsoft.sqlserver.jdbc.SQLServerConnection.checkClosed(Unknown
> >> Source)
> >>        at
> >> com.microsoft.sqlserver.jdbc.SQLServerStatement.checkClosed(Unknown
> >> Source)
> >>        at
> >>
> >>
> com.microsoft.sqlserver.jdbc.SQLServerPreparedStatement.clearParameters(Unknown
> >> Source)
> >>        at
> >>
> >>
> com.mchange.v2.c3p0.stmt.GooGooStatementCache.refreshStatement(GooGooStatementCache.java:604)
> >>        at
> >>
> >>
> com.mchange.v2.c3p0.stmt.GooGooStatementCache.checkinStatement(GooGooStatementCache.java:236)
> >>        at
> >>
> >>
> com.mchange.v2.c3p0.impl.NewPooledConnection.checkinStatement(NewPooledConnection.java:282)
> >>        at
> >>
> >>
> com.mchange.v2.c3p0.impl.NewProxyPreparedStatement.close(NewProxyPreparedStatement.java:1807)
> >>        at
> >>
> >>
> org.apache.activemq.store.jdbc.DefaultDatabaseLocker.keepAlive(DefaultDatabaseLocker.java:127)
> >>        at
> >>
> >>
> org.apache.activemq.store.jdbc.JDBCPersistenceAdapter.databaseLockKeepAlive(JDBCPersistenceAdapter.java:481)
> >>        at
> >>
> >>
> org.apache.activemq.store.jdbc.JDBCPersistenceAdapter$1.run(JDBCPersistenceAdapter.java:183)
> >>        at
> >> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
> >>        at
> >>
> java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:317)
> >>        at
> >> java.util.concurrent.FutureTask.runAndReset(FutureTask.java:150)
> >>        at
> >>
> >>
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$101(ScheduledThreadPoolExecutor.java:98)
> >>        at
> >>
> >>
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.runPeriodic(ScheduledThreadPoolExecutor.java:181)
> >>        at
> >>
> >>
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:205)
> >>        at
> >>
> >>
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
> >>        at
> >>
> >>
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
> >>        at java.lang.Thread.run(Thread.java:619)
> >> INFO  JDBCPersistenceAdapter         - No longer able to keep the
> >> exclusive
> >> lock so giving up being a master
> >> INFO  BrokerService                  - ActiveMQ Message Broker (master,
> >> ID:QG076619-3332-1236811661934-0:0) is shutting down
> >> INFO  TransportConnection            - The connection to '/
> 10.0.1.5:3333'
> >> is
> >> taking a long time to shutdown.
> >> INFO  TransportConnection            - The connection to '/
> 10.0.1.5:3333'
> >> is
> >> taking a long time to shutdown.
> >> INFO  TransportConnection            - The connection to '/
> 10.0.1.5:3333'
> >> is
> >> taking a long time to shutdown.
> >> WARN  ThreadPoolAsynchronousRunner   -
> >>
> com.mchange.v2.async.ThreadPoolAsynchronousRunner$DeadlockDetector@1b00766
> >> -- APPARENT DEADLOCK!!! Crea
> >> rgency threads for unassigned pending tasks!
> >> WARN  ThreadPoolAsynchronousRunner   -
> >>
> com.mchange.v2.async.ThreadPoolAsynchronousRunner$DeadlockDetector@1b00766
> >> -- APPARENT DEADLOCK!!! Comp
> >> tus:
> >>        Managed Threads: 3
> >>        Active Threads: 3
> >>        Active Tasks:
> >>
> >> com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@81933a
> >> (com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread
> >>
> >> com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@e90097
> >> (com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread
> >>
> >> com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@125ee49
> >> (com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThrea
> >>        Pending Tasks:
> >>
> >>
> com.mchange.v2.resourcepool.BasicResourcePool$1DestroyResourceTask@13f212a
> >>
> >> com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@19a6087
> >>
> >>
> com.mchange.v2.resourcepool.BasicResourcePool$1DestroyResourceTask@37504d
> >>
> >> com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@178feba
> >>
> >>
> com.mchange.v2.resourcepool.BasicResourcePool$1DestroyResourceTask@9b86ea
> >>
> >> com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@b6a561
> >>
> >>
> com.mchange.v2.resourcepool.BasicResourcePool$1DestroyResourceTask@123961b
> >>
> >> com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@153f141
> >>
> >> com.mchange.v2.resourcepool.BasicResourcePool$1DestroyResourceTask@405f6
> >>
> >> com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@235e9d
> >>
> >>
> com.mchange.v2.resourcepool.BasicResourcePool$1DestroyResourceTask@189cab
> >>
> >> com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@1d5b945
> >>
> >> com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@767fb3
> >>
> >>
> com.mchange.v2.c3p0.stmt.GooGooStatementCache$1StatementCloseTask@1b9e7fc
> >> Pool thread stack traces:
> >>
> >>
> >>
> Thread[com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#0,5,main]
> >>                java.lang.Thread.sleep(Native Method)
> >>
> >>
> >>
> com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask.run(BasicResourcePool.java:1805)
> >>
> >>
> >>
> com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:547)
> >>
> >>
> >>
> Thread[com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#2,5,main]
> >>                java.lang.Thread.sleep(Native Method)
> >>
> >>
> >>
> com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask.run(BasicResourcePool.java:1805)
> >>
> >>
> >>
> com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:547)
> >>
> >>
> >>
> Thread[com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#1,5,main]
> >>                java.lang.Thread.sleep(Native Method)
> >>
> >>
> >>
> com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask.run(BasicResourcePool.java:1805)
> >>
> >>
> >>
> com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:547)
> >>
> >>
> >> INFO  TransportConnection            - The connection to '/
> 10.0.1.5:3333'
> >> is
> >> taking a long time to shutdown.
> >> INFO  TransportConnection            - The connection to '/
> 10.0.1.5:3333'
> >> is
> >> taking a long time to shutdown.
> >> INFO  TransportConnection            - The connection to '/
> 10.0.1.5:3333'
> >> is
> >> taking a long time to shutdown.
> >> INFO  TransportConnection            - The connection to '/
> 10.0.1.5:3333'
> >> is
> >> taking a long time to shutdown.
> >> INFO  TransportConnection            - The connection to '/
> 10.0.1.5:3333'
> >> is
> >> taking a long time to shutdown.
> >> INFO  TransportConnection            - The connection to '/
> 10.0.1.5:3333'
> >> is
> >> taking a long time to shutdown.
> >> INFO  TransportConnection            - The connection to '/
> 10.0.1.5:3333'
> >> is
> >> taking a long time to shutdown.
> >> INFO  TransportConnection            - The connection to '/
> 10.0.1.5:3333'
> >> is
> >> taking a long time to shutdown.
> >> ERROR QueueStorePrefetch             - Failed to get message count
> >> java.io.IOException: An attempt by a client to checkout a Connection has
> >> timed out.
> >>        at
> >>
> >>
> org.apache.activemq.util.IOExceptionSupport.create(IOExceptionSupport.java:45)
> >>        at
> >>
> >>
> org.apache.activemq.store.jdbc.TransactionContext.getConnection(TransactionContext.java:61)
> >>        at
> >>
> >>
> org.apache.activemq.store.jdbc.adapter.DefaultJDBCAdapter.doGetMessageCount(DefaultJDBCAdapter.java:687)
> >>        at
> >>
> >>
> org.apache.activemq.store.jdbc.JDBCMessageStore.getMessageCount(JDBCMessageStore.java:208)
> >>        at
> >>
> >>
> org.apache.activemq.store.ProxyMessageStore.getMessageCount(ProxyMessageStore.java:79)
> >>        at
> >>
> >>
> org.apache.activemq.broker.region.cursors.QueueStorePrefetch.getStoreSize(QueueStorePrefetch.java:63)
> >>        at
> >>
> >>
> org.apache.activemq.broker.region.cursors.AbstractStoreCursor.gc(AbstractStoreCursor.java:212)
> >>        at
> >>
> >>
> org.apache.activemq.broker.region.cursors.StoreQueueCursor.gc(StoreQueueCursor.java:257)
> >>        at
> >>
> org.apache.activemq.broker.region.Queue.removeSubscription(Queue.java:308)
> >>        at
> >>
> >>
> org.apache.activemq.broker.region.AbstractRegion.removeConsumer(AbstractRegion.java:324)
> >>        at
> >>
> >>
> org.apache.activemq.broker.region.RegionBroker.removeConsumer(RegionBroker.java:392)
> >>        at
> >>
> >>
> org.apache.activemq.broker.BrokerFilter.removeConsumer(BrokerFilter.java:114)
> >>        at
> >>
> >>
> org.apache.activemq.broker.BrokerFilter.removeConsumer(BrokerFilter.java:114)
> >>        at
> >>
> >>
> org.apache.activemq.advisory.AdvisoryBroker.removeConsumer(AdvisoryBroker.java:222)
> >>        at
> >>
> >>
> org.apache.activemq.broker.BrokerFilter.removeConsumer(BrokerFilter.java:114)
> >>        at
> >>
> >>
> org.apache.activemq.broker.MutableBrokerFilter.removeConsumer(MutableBrokerFilter.java:121)
> >>        at
> >>
> >>
> org.apache.activemq.broker.TransportConnection.processRemoveConsumer(TransportConnection.java:565)
> >>        at
> >>
> >>
> org.apache.activemq.broker.TransportConnection.processRemoveSession(TransportConnection.java:600)
> >>        at
> >>
> >>
> org.apache.activemq.broker.TransportConnection.processRemoveConnection(TransportConnection.java:705)
> >>        at
> >>
> >>
> org.apache.activemq.broker.TransportConnection.doStop(TransportConnection.java:1000)
> >>        at
> >>
> >>
> org.apache.activemq.broker.jmx.ManagedTransportConnection.doStop(ManagedTransportConnection.java:74)
> >>        at
> >>
> >>
> org.apache.activemq.broker.TransportConnection$3.run(TransportConnection.java:925)
> >> Caused by: java.sql.SQLException: An attempt by a client to checkout a
> >> Connection has timed out.
> >>        at com.mchange.v2.sql.SqlUtils.toSQLException(SqlUtils.java:106)
> >>        at com.mchange.v2.sql.SqlUtils.toSQLException(SqlUtils.java:65)
> >>        at
> >>
> >>
> com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:527)
> >>        at
> >>
> >>
> com.mchange.v2.c3p0.impl.AbstractPoolBackedDataSource.getConnection(AbstractPoolBackedDataSource.java:128)
> >>        at
> >>
> >>
> org.apache.activemq.store.jdbc.TransactionContext.getConnection(TransactionContext.java:54)
> >>        ... 20 more
> >> Caused by: com.mchange.v2.resourcepool.TimeoutException: A client timed
> >> out
> >> while waiting to acquire a resource from com.mchange.v2.resourcepo
> >> ResourcePool@d964af -- timeout at awaitAvailable()
> >>        at
> >>
> >>
> com.mchange.v2.resourcepool.BasicResourcePool.awaitAvailable(BasicResourcePool.java:1317)
> >>        at
> >>
> >>
> com.mchange.v2.resourcepool.BasicResourcePool.prelimCheckoutResource(BasicResourcePool.java:557)
> >>        at
> >>
> >>
> com.mchange.v2.resourcepool.BasicResourcePool.checkoutResource(BasicResourcePool.java:477)
> >>        at
> >>
> >>
> com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:525)
> >>        ... 22 more
> >> WARN  TransportConnection            - Failed to remove consumer:
> >> 9cf41a09-ad04-42c0-af9c-efcedb5e61a6:1:1. Reason:
> >> java.lang.RuntimeException
> >> o.IOException: An attempt by a client to checkout a Connection has timed
> >> out.
> >> java.lang.RuntimeException: java.io.IOException: An attempt by a client
> >> to
> >> checkout a Connection has timed out.
> >>        at
> >>
> >>
> org.apache.activemq.broker.region.cursors.QueueStorePrefetch.getStoreSize(QueueStorePrefetch.java:66)
> >>        at
> >>
> >>
> org.apache.activemq.broker.region.cursors.AbstractStoreCursor.gc(AbstractStoreCursor.java:212)
> >>        at
> >>
> >>
> org.apache.activemq.broker.region.cursors.StoreQueueCursor.gc(StoreQueueCursor.java:257)
> >>        at
> >>
> org.apache.activemq.broker.region.Queue.removeSubscription(Queue.java:308)
> >>        at
> >>
> >>
> org.apache.activemq.broker.region.AbstractRegion.removeConsumer(AbstractRegion.java:324)
> >>        at
> >>
> >>
> org.apache.activemq.broker.region.RegionBroker.removeConsumer(RegionBroker.java:392)
> >>        at
> >>
> >>
> org.apache.activemq.broker.BrokerFilter.removeConsumer(BrokerFilter.java:114)
> >>        at
> >>
> >>
> org.apache.activemq.broker.BrokerFilter.removeConsumer(BrokerFilter.java:114)
> >>        at
> >>
> >>
> org.apache.activemq.advisory.AdvisoryBroker.removeConsumer(AdvisoryBroker.java:222)
> >>        at
> >>
> >>
> org.apache.activemq.broker.BrokerFilter.removeConsumer(BrokerFilter.java:114)
> >>        at
> >>
> >>
> org.apache.activemq.broker.MutableBrokerFilter.removeConsumer(MutableBrokerFilter.java:121)
> >>        at
> >>
> >>
> org.apache.activemq.broker.TransportConnection.processRemoveConsumer(TransportConnection.java:565)
> >>        at
> >>
> >>
> org.apache.activemq.broker.TransportConnection.processRemoveSession(TransportConnection.java:600)
> >>        at
> >>
> >>
> org.apache.activemq.broker.TransportConnection.processRemoveConnection(TransportConnection.java:705)
> >>        at
> >>
> >>
> org.apache.activemq.broker.TransportConnection.doStop(TransportConnection.java:1000)
> >>        at
> >>
> >>
> org.apache.activemq.broker.jmx.ManagedTransportConnection.doStop(ManagedTransportConnection.java:74)
> >>        at
> >>
> >>
> org.apache.activemq.broker.TransportConnection$3.run(TransportConnection.java:925)
> >> Caused by: java.io.IOException: An attempt by a client to checkout a
> >> Connection has timed out.
> >>        at
> >>
> >>
> org.apache.activemq.util.IOExceptionSupport.create(IOExceptionSupport.java:45)
> >>        at
> >>
> >>
> org.apache.activemq.store.jdbc.TransactionContext.getConnection(TransactionContext.java:61)
> >>        at
> >>
> >>
> org.apache.activemq.store.jdbc.adapter.DefaultJDBCAdapter.doGetMessageCount(DefaultJDBCAdapter.java:687)
> >>        at
> >>
> >>
> org.apache.activemq.store.jdbc.JDBCMessageStore.getMessageCount(JDBCMessageStore.java:208)
> >>        at
> >>
> >>
> org.apache.activemq.store.ProxyMessageStore.getMessageCount(ProxyMessageStore.java:79)
> >>        at
> >>
> >>
> org.apache.activemq.broker.region.cursors.QueueStorePrefetch.getStoreSize(QueueStorePrefetch.java:63)
> >>        ... 16 more
> >> Caused by: java.sql.SQLException: An attempt by a client to checkout a
> >> Connection has timed out.
> >>        at com.mchange.v2.sql.SqlUtils.toSQLException(SqlUtils.java:106)
> >>        at com.mchange.v2.sql.SqlUtils.toSQLException(SqlUtils.java:65)
> >>        at
> >>
> >>
> com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:527)
> >>        at
> >>
> >>
> com.mchange.v2.c3p0.impl.AbstractPoolBackedDataSource.getConnection(AbstractPoolBackedDataSource.java:128)
> >>        at
> >>
> >>
> org.apache.activemq.store.jdbc.TransactionContext.getConnection(TransactionContext.java:54)
> >>        ... 20 more
> >> Caused by: com.mchange.v2.resourcepool.TimeoutException: A client timed
> >> out
> >> while waiting to acquire a resource from com.mchange.v2.resourcepo
> >> ResourcePool@d964af -- timeout at awaitAvailable()
> >>        at
> >>
> >>
> com.mchange.v2.resourcepool.BasicResourcePool.awaitAvailable(BasicResourcePool.java:1317)
> >>        at
> >>
> >>
> com.mchange.v2.resourcepool.BasicResourcePool.prelimCheckoutResource(BasicResourcePool.java:557)
> >>        at
> >>
> >>
> com.mchange.v2.resourcepool.BasicResourcePool.checkoutResource(BasicResourcePool.java:477)
> >>        at
> >>
> >>
> com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:525)
> >>        ... 22 more
> >> INFO  TransportConnector             - Connector openwire Stopped
> >>
> >>
> >> bsnyder wrote:
> >> >
> >> > On Tue, Mar 10, 2009 at 4:40 PM, magellings <mark.gellings@qg.com>
> >> wrote:
> >> >>
> >> >> Thanks for the response Bruce.  :)
> >> >>
> >> >> To my knowledge we aren't using a connection pooler.  We're just
> >> >> configuring
> >> >> the activemq xml and letting activeMQ do its thing.  One of my
> >> colleagues
> >> >> mentioned SNAC since we are using Sql Server, not sure if that is
> >> similar
> >> >> to
> >> >> a connection pooler or not.
> >> >
> >> > The job of a JDBC connection pooler is to keep a pool of JDBC
> >> > connections available for use by a Java application. IIRC, SNAC stands
> >> > for SQL Native Client which has nothing to do with a JDBC connection
> >> > pooler.
> >> >
> >> >> In our scenario during a Sql Server failover it may take 15 minutes.
> >> We
> >> >> aren't using a high availability cluster.  Does a connection pooler
> >> give
> >> >> the
> >> >> capability of dealing with this so that ActiveMQ doesn't shutdown?
> >> >
> >> > One of the options in a good JDBC connection pooler is the ability to
> >> > test JDBC connections as it hands them out to the Java application. If
> >> > the connection is stale for any reason the JDBC connection pooler will
> >> > evict that connection from the pool and try the next one until it
> >> > reaches one that is alive. To my knowledge, some JDBC connection
> >> > poolers provide a the ability to configure some attributes like number
> >> > of retries, etc. E.g., here is some information about what c3p0
> >> > offers:
> >> >
> >> > http://www.mchange.com/projects/c3p0/index.html#configuring_recovery
> >> >
> >> > The one big caveat I will mention is that longer outage periods such
> >> > as the 15 minute outage you mention are not typically handled by a
> >> > JDBC connection pooler as they're mainly geared toward handling
> >> > momentary outages. As an example, notice that the default value for
> >> > acquireRetryDelay in c3p0 is only one second:
> >> >
> >> > http://www.mchange.com/projects/c3p0/index.html#acquireRetryDelay
> >> >
> >> > But you could certainly configure this to any value you want. I
> >> > encourage you to test this in your environment before deploying to
> >> > production.
> >> >
> >> > Bruce
> >> > --
> >> > perl -e 'print
> >> > unpack("u30","D0G)U8V4\@4VYY9&5R\"F)R=6-E+G-N>61E<D\!G;6%I;\"YC;VT*"
> >> > );'
> >> >
> >> > Apache ActiveMQ - http://activemq.apache.org/
> >> > Apache Camel - http://camel.apache.org/
> >> > Apache ServiceMix - http://servicemix.apache.org/
> >> >
> >> > Blog: http://bruceblog.org/
> >> >
> >> >
> >>
> >> --
> >> View this message in context:
> >>
> http://www.nabble.com/Is-there-JDBC-master-slave-retry-logic-if-database-goes-down--tp22440338p22466448.html
> >> Sent from the ActiveMQ - User mailing list archive at Nabble.com.
> >>
> >>
> >
> >
> > --
> > http://blog.garytully.com
> >
> > Open Source SOA
> > http://FUSESource.com
> >
> >
>
> --
> View this message in context:
> http://www.nabble.com/Is-there-JDBC-master-slave-retry-logic-if-database-goes-down--tp22440338p22939332.html
> Sent from the ActiveMQ - User mailing list archive at Nabble.com.
>
>


-- 
http://blog.garytully.com

Open Source SOA
http://FUSESource.com

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