[GEODE-7043] Session cache throws NPE during startup if no servers are available

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Duplicate
• Component/s: http session
• Assignee: Unassigned
• Reporter: Bruce J Schuchardt
• Created: 02/Aug/19 17:47
• Updated: 14/May/21 20:02
• Resolved: 14/May/21 20:02

Description

While writing a rolling-upgrade test I accidentally started a client session state cache using v1.9 when no servers were available.  The client encountered an NPE and threw a FunctionException.

org.apache.geode.test.dunit.RMIException: While invoking org.apache.geode.modules.util.ClientServerSessionCacheDUnitTest$$Lambda$30/262445056.run in VM 3 running on Host localhost with 4 VMs with version 190

at org.apache.geode.test.dunit.VM.executeMethodOnObject(VM.java:579)
at org.apache.geode.test.dunit.VM.invoke(VM.java:406)
at org.apache.geode.modules.util.ClientServerSessionCacheDUnitTest.performARollingUpgrade(ClientServerSessionCacheDUnitTest.java:152)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.apache.geode.test.dunit.rules.AbstractDistributedRule$1.evaluate(AbstractDistributedRule.java:59)
at org.apache.geode.test.dunit.rules.AbstractDistributedRule$1.evaluate(AbstractDistributedRule.java:59)
at org.apache.geode.test.dunit.rules.AbstractDistributedRule$1.evaluate(AbstractDistributedRule.java:59)
at org.junit.rules.RunRules.evaluate(RunRules.java:20)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
Caused by: org.apache.geode.cache.execute.FunctionException: java.lang.NullPointerException
at org.apache.geode.internal.cache.execute.ServerFunctionExecutor.executeOnServer(ServerFunctionExecutor.java:157)
at org.apache.geode.internal.cache.execute.ServerFunctionExecutor.executeFunction(ServerFunctionExecutor.java:125)
at org.apache.geode.internal.cache.execute.AbstractExecution.execute(AbstractExecution.java:398)
at org.apache.geode.modules.session.catalina.ClientServerSessionCache.bootstrapServers(ClientServerSessionCache.java:159)
at org.apache.geode.modules.session.catalina.ClientServerSessionCache.initialize(ClientServerSessionCache.java:62)
at org.apache.geode.modules.util.ClientServerSessionCacheDUnitTest.startClientSessionCacheWithPort(ClientServerSessionCacheDUnitTest.java:458)
at org.apache.geode.modules.util.ClientServerSessionCacheDUnitTest.startClientSessionCache(ClientServerSessionCacheDUnitTest.java:441)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.geode.test.dunit.internal.MethodInvoker.executeObject(MethodInvoker.java:123)
at org.apache.geode.test.dunit.internal.RemoteDUnitVM.executeMethodOnObject(RemoteDUnitVM.java:69)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:357)
at sun.rmi.transport.Transport$1.run(Transport.java:200)
at sun.rmi.transport.Transport$1.run(Transport.java:197)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.Transport.serviceCall(Transport.java:196)
at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:573)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:834)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$0(TCPTransport.java:688)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:687)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.NullPointerException
at org.apache.geode.cache.client.internal.ExecuteFunctionOp.constructAndGetFunctionTasks(ExecuteFunctionOp.java:339)
at org.apache.geode.cache.client.internal.ExecuteFunctionOp.execute(ExecuteFunctionOp.java:85)
at org.apache.geode.internal.cache.execute.ServerFunctionExecutor.executeOnServer(ServerFunctionExecutor.java:145)
... 29 more

Issue Links

• duplicates: GEODE-7746 An onServers function throws a NullPointerException if the distributed system is shutdown