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Websphere thread hungs
The issue usually manifests itself with a line in the SystemOut.log or equivalent reporting the following:
WSVR0605W: Thread "THREAD NAME : ID" (55c8824f) has been active for 600,112 milliseconds and may be hung. There are 1 threads in total in the server that may be hung.
If you do a thread dump in your App Server at this point, you will see something like so:
- waiting on <0x93d29020> (a java.lang.Object)
at java.lang.Object.wait(Object.java:429)
at com.crystaldecisions.thirdparty.com.ooc.OB.Downcall.waitUntilCompleted(Downcall.java:831)
- locked <0x93d29020> (a java.lang.Object)
at com.crystaldecisions.thirdparty.com.ooc.OB.GIOPClientWorkerThreaded.receive(GIOPClientWorkerThreaded.java:327)
at com.crystaldecisions.thirdparty.com.ooc.OB.GIOPClientWorkerThreaded.sendReceive(GIOPClientWorkerThreaded.java:353)
at com.crystaldecisions.thirdparty.com.ooc.OB.Downcall.request(Downcall.java:336)
at com.crystaldecisions.thirdparty.com.ooc.OB.DowncallStub.invoke(DowncallStub.java:583)
at com.crystaldecisions.thirdparty.com.ooc.CORBA.Delegate.invoke(Delegate.java:579)
at com.crystaldecisions.thirdparty.org.omg.CORBA.portable.ObjectImpl._invoke(ObjectImpl.java:125)
at com.crystaldecisions.enterprise.ocaframework.idl.OCA.OCAi._InfoStoreEx3Stub.queryEx3(_InfoStoreEx3Stub.java:62)
at com.crystaldecisions.enterprise.ocaframework.j.a(Unknown Source)
at com.crystaldecisions.enterprise.ocaframework.j.find(Unknown Source)
at com.crystaldecisions.enterprise.ocaframework.AbstractServerHandler.buildServerInfo(Unknown Source)
at com.crystaldecisions.enterprise.ocaframework.AbstractServerHandler.buildClusterInfo(Unknown Source)
at com.crystaldecisions.enterprise.ocaframework.aa.for(Unknown Source)
at com.crystaldecisions.enterprise.ocaframework.ServiceMgr.for(Unknown Source)
at com.crystaldecisions.enterprise.ocaframework.o.a(Unknown Source)
at com.crystaldecisions.enterprise.ocaframework.o.a(Unknown Source)
at com.crystaldecisions.enterprise.ocaframework.o.a(Unknown Source)
at com.crystaldecisions.enterprise.ocaframework.p.a(Unknown Source)
at com.crystaldecisions.enterprise.ocaframework.ServiceMgr.getManagedService(Unknown Source)
at com.crystaldecisions.sdk.occa.managedreports.ras.internal.CECORBACommunicationAdapter.connect(Unknown Source)
at com.crystaldecisions.sdk.occa.managedreports.ras.internal.RASReportAppFactory.a(Unknown Source)
at com.crystaldecisions.sdk.occa.managedreports.ras.internal.RASReportAppFactory.a(Unknown Source)
at com.crystaldecisions.sdk.occa.managedreports.ras.internal.RASReportAppFactory.openDocument(Unknown Source)
at com.crystaldecisions.sdk.occa.managedreports.ras.internal.RASReportAppFactory.openDocument(Unknown Source)
at com.talic.pi.utils.ReportingEngine.generateReport(ReportingEngine.java:86)
at com.talic.pi.cms.dao.ReportsDAO.generateReport(ReportsDAO.java:31)
at com.talic.pi.cms.component.ReportGeneratorComponentImpl.generateReport(ReportGeneratorComponentImpl.java:41)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at com.ibm.ws.sca.internal.java.handler.JavaReflectionAdapter$2.run(JavaReflectionAdapter.java:152)
The cause:
This is mainly caused by reports that take a great deal of time to execute causing the application server to report that the processing thread is 'hung'. A worse side effect of this is when the application server runs out of threads and is unable to process any further requests due to these hung threads.
The solution:
The problem is due to the fact that the Corba Timeout has not been set. You've missed the clientSDKOptions.xml in your deployment. This causes the RAS SDK to probably never timeout its call to the RAS.
Create a file called clientSDKOptions.xml and place it in your application's WEB-INF/classes folder, or alternatively, you could place it in a server wide classpath folder like 'applib' on OC4J or $WASPROFILE/properties on WebSphere.
The contents of the file should be as follows:
<CrystalReports.ClientSDKOptions
xmlns:xsi="http://www.w3.org/1999/XMLSchema-instance"
version="2"
xsi:type="CrystalReports.ClientSDKOptions">
<CORBARequestTimeout>120000</CORBARequestTimeout>
</CrystalReports.ClientSDKOptions>
Restart your app and your done. Your call should now timeout within 2 minutes (something with you can change) and you can say goodbye to your Hung Threads issue.
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I
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knew I'd learn lots from the consultant. We
went on to stay in close touch. I owe him a big thank you for many learning over the years - the biggest of which was undertaking a
journey to understand myself better and be comfortable with myself. I would suggest
http://mhelpdesk.com/field-service-management-software/ for all the informative and massive detail about the related query.
How to build a universe
Approach 1. Start with a small concentrated lump of matter and energy. Let it go with a big bang.
Approach 2. Let there be light!
My Employer Says They Are Going To Cut My Wages. Can They?
If you are in the middle of a contract, then cutting your wages is almost certainly a violation of your employment law rights. While I am by no means an expert on this matter, I did have a similar issue years ago - mid-contract wage cuts - and I hired an
employment attorney to fight the case on my behalf. It turned out that my employer was basically looking to scare people into taking the wage cut.
They got into some pretty serious legal trouble for their transgression, and nothing happened to me in terms of wage cuts after that. If you are between contracts, your employer can re-negotiate your salary, but as far as I am aware, if you are in an agreed-upon contract, they cannot just decide to reduce your salary. If you want to settle matters, contest this action with support from a legal professional.
Solitaire master has a hang
clarify pi please. if you meant pi to mean main screen picture, you probably have used up your free time on this program.
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