Hi,

I frequently get this exception when running Stratos for longtime (10+
minutes). Please note that most failures occurs when metadata service also
save properties in the registry (not all the time, this occurs when
metadata is not persisting too).


2015-05-07 07:03:11,725] ERROR
{org.apache.stratos.cloud.controller.registry.RegistryManager} - * Failed
to persist resource in registry: /cloud.controller/topology*
org.wso2.carbon.registry.core.exceptions.RegistryException: Failed to check
the existence of the resource
/_system/governance/cloud.controller/topology. Timeout trying to lock table
"REG_RESOURCE"; SQL statement:
SELECT REG_VERSION FROM REG_RESOURCE WHERE REG_PATH_ID=? AND REG_NAME=? AND
REG_TENANT_ID=? [50200-140]
at
org.wso2.carbon.registry.core.jdbc.dao.JDBCResourceDAO.getVersion(JDBCResourceDAO.java:206)
at
org.wso2.carbon.registry.core.jdbc.dao.JDBCResourceDAO.resourceExists(JDBCResourceDAO.java:147)
at
org.wso2.carbon.registry.core.jdbc.dao.JDBCResourceDAO.resourceExists(JDBCResourceDAO.java:156)
at
org.wso2.carbon.registry.core.jdbc.Repository.resourceExists(Repository.java:134)
at
org.wso2.carbon.registry.core.jdbc.EmbeddedRegistry.put(EmbeddedRegistry.java:688)
at
org.wso2.carbon.registry.core.caching.CacheBackedRegistry.put(CacheBackedRegistry.java:465)
at
org.wso2.carbon.registry.core.session.UserRegistry.put(UserRegistry.java:657)
at
org.apache.stratos.cloud.controller.registry.RegistryManager.persist(RegistryManager.java:73)
at
org.apache.stratos.cloud.controller.util.CloudControllerUtil.persistTopology(CloudControllerUtil.java:276)
at
org.apache.stratos.cloud.controller.messaging.topology.TopologyManager.updateTopology(TopologyManager.java:103)
at
org.apache.stratos.cloud.controller.messaging.topology.TopologyBuilder.handleMemberStarted(TopologyBuilder.java:555)
at
org.apache.stratos.cloud.controller.messaging.receiver.instance.status.InstanceStatusTopicReceiver$2.onEvent(InstanceStatusTopicReceiver.java:75)
at
org.apache.stratos.messaging.listener.EventListener.update(EventListener.java:42)
at java.util.Observable.notifyObservers(Observable.java:159)
at
org.apache.stratos.messaging.event.EventObservable.notifyEventListeners(EventObservable.java:51)
at
org.apache.stratos.messaging.message.processor.instance.status.InstanceStatusMemberStartedMessageProcessor.process(InstanceStatusMemberStartedMessageProcessor.java:49)
at
org.apache.stratos.messaging.message.processor.instance.status.InstanceStatusMemberActivatedMessageProcessor.process(InstanceStatusMemberActivatedMessageProcessor.java:53)
at
org.apache.stratos.messaging.message.processor.MessageProcessorChain.process(MessageProcessorChain.java:61)
at
org.apache.stratos.messaging.message.receiver.instance.status.InstanceStatusEventMessageDelegator.run(InstanceStatusEventMessageDelegator.java:71)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:744)
Caused by: org.h2.jdbc.JdbcSQLException: Timeout trying to lock table
"REG_RESOURCE"; SQL statement:
SELECT REG_VERSION FROM REG_RESOURCE WHERE REG_PATH_ID=? AND REG_NAME=? AND
REG_TENANT_ID=? [50200-140]
at org.h2.message.DbException.getJdbcSQLException(DbException.java:327)
at org.h2.message.DbException.get(DbException.java:167)
at org.h2.message.DbException.get(DbException.java:144)
at org.h2.table.RegularTable.doLock(RegularTable.java:466)
at org.h2.table.RegularTable.lock(RegularTable.java:404)
at org.h2.table.TableFilter.lock(TableFilter.java:139)
at org.h2.command.dml.Select.queryWithoutCache(Select.java:554)
at org.h2.command.dml.Query.query(Query.java:241)
at org.h2.command.CommandContainer.query(CommandContainer.java:80)
at org.h2.command.Command.executeQuery(Command.java:132)
at
org.h2.jdbc.JdbcPreparedStatement.executeQuery(JdbcPreparedStatement.java:96)
at
org.wso2.carbon.registry.core.jdbc.dao.JDBCResourceDAO.getVersion(JDBCResourceDAO.java:197)
... 23 more
[2015-05-07 07:03:11,726] FATAL
{org.apache.stratos.cloud.controller.util.CloudControllerUtil} -  Failed to
persist the Topology in registry.
org.wso2.carbon.registry.core.exceptions.RegistryException: Failed to
persist resource in registry: /cloud.controller/topology
at
org.apache.stratos.cloud.controller.registry.RegistryManager.persist(RegistryManager.java:85)
at
org.apache.stratos.cloud.controller.util.CloudControllerUtil.persistTopology(CloudControllerUtil.java:276)
at
org.apache.stratos.cloud.controller.messaging.topology.TopologyManager.updateTopology(TopologyManager.java:103)
at
org.apache.stratos.cloud.controller.messaging.topology.TopologyBuilder.handleMemberStarted(TopologyBuilder.java:555)
at
org.apache.stratos.cloud.controller.messaging.receiver.instance.status.InstanceStatusTopicReceiver$2.onEvent(InstanceStatusTopicReceiver.java:75)
at
org.apache.stratos.messaging.listener.EventListener.update(EventListener.java:42)
at java.util.Observable.notifyObservers(Observable.java:159)
at
org.apache.stratos.messaging.event.EventObservable.notifyEventListeners(EventObservable.java:51)
at
org.apache.stratos.messaging.message.processor.instance.status.InstanceStatusMemberStartedMessageProcessor.process(InstanceStatusMemberStartedMessageProcessor.java:49)
at
org.apache.stratos.messaging.message.processor.instance.status.InstanceStatusMemberActivatedMessageProcessor.process(InstanceStatusMemberActivatedMessageProcessor.java:53)
at
org.apache.stratos.messaging.message.processor.MessageProcessorChain.process(MessageProcessorChain.java:61)
at
org.apache.stratos.messaging.message.receiver.instance.status.InstanceStatusEventMessageDelegator.run(InstanceStatusEventMessageDelegator.java:71)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:744)
Caused by: org.wso2.carbon.registry.core.exceptions.RegistryException:
Failed to check the existence of the resource
/_system/governance/cloud.controller/topology. Timeout trying to lock table
"REG_RESOURCE"; SQL statement:
SELECT REG_VERSION FROM REG_RESOURCE WHERE REG_PATH_ID=? AND REG_NAME=? AND
REG_TENANT_ID=? [50200-140]
at
org.wso2.carbon.registry.core.jdbc.dao.JDBCResourceDAO.getVersion(JDBCResourceDAO.java:206)
at
org.wso2.carbon.registry.core.jdbc.dao.JDBCResourceDAO.resourceExists(JDBCResourceDAO.java:147)
at
org.wso2.carbon.registry.core.jdbc.dao.JDBCResourceDAO.resourceExists(JDBCResourceDAO.java:156)
at
org.wso2.carbon.registry.core.jdbc.Repository.resourceExists(Repository.java:134)
at
org.wso2.carbon.registry.core.jdbc.EmbeddedRegistry.put(EmbeddedRegistry.java:688)
at
org.wso2.carbon.registry.core.caching.CacheBackedRegistry.put(CacheBackedRegistry.java:465)
at
org.wso2.carbon.registry.core.session.UserRegistry.put(UserRegistry.java:657)
at
org.apache.stratos.cloud.controller.registry.RegistryManager.persist(RegistryManager.java:73)
... 16 more
Caused by: org.h2.jdbc.JdbcSQLException: Timeout trying to lock table
"REG_RESOURCE"; SQL statement:
SELECT REG_VERSION FROM REG_RESOURCE WHERE REG_PATH_ID=? AND REG_NAME=? AND
REG_TENANT_ID=? [50200-140]
at org.h2.message.DbException.getJdbcSQLException(DbException.java:327)
at org.h2.message.DbException.get(DbException.java:167)
at org.h2.message.DbException.get(DbException.java:144)
at org.h2.table.RegularTable.doLock(RegularTable.java:466)
at org.h2.table.RegularTable.lock(RegularTable.java:404)
at org.h2.table.TableFilter.lock(TableFilter.java:139)
at org.h2.command.dml.Select.queryWithoutCache(Select.java:554)
at org.h2.command.dml.Query.query(Query.java:241)
at org.h2.command.CommandContainer.query(CommandContainer.java:80)
at org.h2.command.Command.executeQuery(Command.java:132)
at
org.h2.jdbc.JdbcPreparedStatement.executeQuery(JdbcPreparedStatement.java:96)
at
org.wso2.carbon.registry.core.jdbc.dao.JDBCResourceDAO.getVersion(JDBCResourceDAO.java:197)
... 23 more


-- 

Udara Liyanage
Software Engineer
WSO2, Inc.: http://wso2.com
lean. enterprise. middleware

web: http://udaraliyanage.wordpress.com
phone: +94 71 443 6897

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