Threads going into waiting & Blocked state and Integration Server not responding

Hi Ram,

Please find the URL below.

https://gceasy.io/my-thread-report.jsp?p=c2hhcmVkLzIwMjIvMDMvMTgvLS1URF82NTVfMTdtYXJfMS4yMHBtLnR4dC0tMC0zMy0yNg==&;

Thank you.

Regards,

Nara.

Hello Nara!

 Greetings. Below is the excerpt from your thread dump analysis report:

Above is the transitive dependency graph which is telling that 44 threads are getting BLoCKED. Actually in your application there is a 'Integration Server Thread', this thread acquired the 'com.wm.app.b2b.server.ServerClassLoader' lock and didn't release it. Due to which 44 other threads got blocked. Below is the top portion of the stack trace of this 'Integration Server Thread':

Stack Trace is:
at java.lang.ClassLoader.loadClass(ClassLoader.java:404)
- locked <0x6d497769> (a com.wm.app.b2b.server.ServerClassLoader)
at com.wm.app.b2b.server.ServerClassLoader.loadClass(ServerClassLoader.java:1175)
at com.wm.app.b2b.server.ServerClassLoader.loadClass(ServerClassLoader.java:1108)
at org.apache.xml.serializer.ObjectFactory.findProviderClass(ObjectFactory.java:503)
at org.apache.xml.serializer.SerializerFactory.getSerializer(SerializerFactory.java:129)
at org.apache.xalan.transformer.TransformerIdentityImpl.createResultContentHandler(TransformerIdentityImpl.java:260)
at org.apache.xalan.transformer.TransformerIdentityImpl.transform(TransformerIdentityImpl.java:330)
at org.springframework.ws.client.core.WebServiceTemplate$4.extractData(WebServiceTemplate.java:441)
at org.springframework.ws.client.core.WebServiceTemplate$4.extractData(WebServiceTemplate.java:437)
at org.springframework.ws.client.core.WebServiceTemplate$SourceExtractorMessageExtractor.extractData(WebServiceTemplate.java:807)
at org.springframework.ws.client.core.WebServiceTemplate.doSendAndReceive(WebServiceTemplate.java:596)
at org.springframework.ws.client.core.WebServiceTemplate.sendAndReceive(WebServiceTemplate.java:537)
at org.springframework.ws.client.core.WebServiceTemplate.doSendAndReceive(WebServiceTemplate.java:492)
at org.springframework.ws.client.core.WebServiceTemplate.sendSourceAndReceiveToResult(WebServiceTemplate.java:436)
at org.springframework.ws.client.core.WebServiceTemplate.sendSourceAndReceiveToResult(WebServiceTemplate.java:421)

:

:

You can notice that this thread is trying to load class as part of XML serialization, however this is a slow process and tries to halt the performance of the application.

Similar problem can be found here: Classloading and locking - DZone Performance

Instead of loading the class during runtime, can you load the classes during server initialization time?