We already have this reported at https://wso2.org/jira/browse/CARBON-14435 and https://issues.apache.org/jira/browse/AXIS2-5152.
On Wed, Nov 13, 2013 at 2:43 PM, Kishanthan Thangarajah <[email protected] > wrote: > Looks like DeploymentEngine#addDeployer method is called from all the > synapse artifact related deployer components, which can cause this > concurrent modification exception intermittently. I can reproduce this in > ESB with some sleep introduced at axis2 level for RepositoryListener# > loadOtherDirectories. > > A fix has to be added at axis2 level, since there are number of places in > synapse initialization process where the addDeployer method is called. > > We can properly handle this at axis2 level by synchronizing the > deployerMap object in places (loadOtherDirectories & addDeployer). > > But then the question would be will this cause any impact on the > performance? Since addDeployer only gets called during server start-up and > tenant loading, I think we can go ahead. > > Thoughts? > > Thanks, > Kishanthan. > > > On Wed, Nov 13, 2013 at 9:38 AM, Dushan Abeyruwan <[email protected]> wrote: > >> rtifact repository at : >> /home/dushan/poc/server/4.1.2-pack/connnector-works/worker_mgr/wso2esb-4.8.0-mgr/repository/tenants/1/synapse-configs/default >> [2013-11-13 09:33:02,105] INFO - Axis2SynapseController Loading mediator >> extensions... >> [2013-11-13 09:33:02,108] ERROR - CarbonDeploymentSchedulerTask Error >> while running deployment scheduler.. >> java.util.ConcurrentModificationException >> at java.util.HashMap$HashIterator.nextEntry(HashMap.java:793) >> at java.util.HashMap$EntryIterator.next(HashMap.java:834) >> at java.util.HashMap$EntryIterator.next(HashMap.java:832) >> at >> org.apache.axis2.deployment.RepositoryListener.loadOtherDirectories(RepositoryListener.java:270) >> at >> org.apache.axis2.deployment.RepositoryListener.checkServices(RepositoryListener.java:253) >> at >> org.apache.axis2.deployment.RepositoryListener.startListener(RepositoryListener.java:371) >> at >> org.apache.axis2.deployment.scheduler.SchedulerTask.checkRepository(SchedulerTask.java:59) >> at >> org.apache.axis2.deployment.scheduler.SchedulerTask.run(SchedulerTask.java:67) >> at >> org.wso2.carbon.core.deployment.CarbonDeploymentSchedulerTask.runAxisDeployment(CarbonDeploymentSchedulerTask.java:79) >> at >> org.wso2.carbon.core.deployment.CarbonDeploymentSchedulerTask.run(CarbonDeploymentSchedulerTask.java:124) >> at java.util.concurrent.Executors$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:180) >> at >> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:204) >> at >> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) >> at >> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) >> at java.lang.Thread.run(Thread.java:662) >> [2013-11-13 09:33:02,250] INFO - LibraryArtifactDeployer Synapse Library >> named '{org.wso2.carbon.connectors}salesforce' has been deployed from file >> : >> /home/dushan/poc/server/4.1.2-pack/connnector-works/worker_mgr/wso2esb-4.8.0-mgr/repository/tenants/1/synapse-libs/salesforce-connector.zip >> [2013-11-13 09:33:02,439] INFO - LibraryArtifactDeployer Synapse Library >> named '{org.wso2.carbon.connectors}googlespreadsheet' has been deployed >> from file : >> /home/dushan/poc/server/4.1.2-pack/connnector-works/worker_mgr/wso2esb-4.8.0-mgr/repository/tenants/1/synapse-libs/googlespreadsheet-connect >> >> Cheers, >> Dushan Abeyruwan >> Associate Tech Lead >> *Integration Technologies Team* >> *WSO2 Inc. http://wso2.com/ <http://wso2.com/>* >> *Mobile:(+94)714408632 <%28%2B94%29714408632>* >> > > > > -- > *Kishanthan Thangarajah* > Senior Software Engineer, > Platform Technologies Team, > WSO2, Inc. > lean.enterprise.middleware > > Mobile - +94773426635 > Blog - *http://kishanthan.wordpress.com <http://kishanthan.wordpress.com>* > Twitter - *http://twitter.com/kishanthan <http://twitter.com/kishanthan>* > -- *Kishanthan Thangarajah* Senior Software Engineer, Platform Technologies Team, WSO2, Inc. lean.enterprise.middleware Mobile - +94773426635 Blog - *http://kishanthan.wordpress.com <http://kishanthan.wordpress.com>* Twitter - *http://twitter.com/kishanthan <http://twitter.com/kishanthan>*
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