[JBoss JIRA] Created: (JGRP-1178) GroupRequest: don't send target member list with each request
by Bela Ban (JIRA)
GroupRequest: don't send target member list with each request
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Key: JGRP-1178
URL: https://jira.jboss.org/jira/browse/JGRP-1178
Project: JGroups
Issue Type: Task
Reporter: Bela Ban
Assignee: Bela Ban
Fix For: 2.10
Currently, if we invoke an RPC (RpcDispatcher) or a sync group message (MessageDispatcher), we always send the target membership list with the request.
The reason is that a member receiving a group request can drop it if it is not in the target list. However, for group requests, usually all of the members are in the target list anyway, and responses sent from members not in the list would get dropped anyway, as the GroupRequest itself keeps track of members from which responses are supposed to be received.
For large clusters, the overhead of shipping the target list is too big, e.g. for 100 nodes, the cost of 100 addresses (UUIDs) is roughly 2000 bytes !
SOLUTION: drop the target membership list
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16 years, 3 months
[JBoss JIRA] Created: (JBAS-7667) java.lang.IllegalAccessException: Failed to find connection exception in multithreaded environment
by Smita Nimbalkar (JIRA)
java.lang.IllegalAccessException: Failed to find connection exception in multithreaded environment
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Key: JBAS-7667
URL: https://jira.jboss.org/jira/browse/JBAS-7667
Project: JBoss Application Server
Issue Type: Bug
Security Level: Public (Everyone can see)
Affects Versions: JBossAS-5.1.0.GA
Environment: JBoss Version: jboss-5.1.0.GA, OS: Linux (2.6.18-164.el5), Architecture: amd64 64bit, JVM: Java HotSpot(TM) 64-Bit Server VM (14.0-b16, mixed mode)
Reporter: Smita Nimbalkar
I have a method which takes java.sql.Connection from connection pool do some operation on DB and then close connection (i.e. return to the pool). There are multiple threads which are executing this method. Every time I execute this in multithreaded environment I get java.lang.IllegalAccessException: Failed to find connection exception on line connection.prepareStatement(query) of my class. But this issue goes away if I synchronize (on class object) code block which closes DB connection. Following is a exception trace:
Caused by: java.lang.IllegalAccessException: Failed to find connection: 2365173
at org.jboss.resource.adapter.jdbc.remote.WrapperDataSourceService.invoke(WrapperDataSourceService.java:212)
at sun.reflect.GeneratedMethodAccessor283.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:157)
at org.jboss.mx.server.Invocation.dispatch(Invocation.java:96)
at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:668)
at org.jboss.invocation.jrmp.server.JRMPInvoker$MBeanServerAction.invoke(JRMPInvoker.java:855)
at org.jboss.invocation.jrmp.server.JRMPInvoker.invoke(JRMPInvoker.java:422)
at sun.reflect.GeneratedMethodAccessor282.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:305)
at sun.rmi.transport.Transport$1.run(Transport.java:159)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.Transport.serviceCall(Transport.java:155)
at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:535)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:790)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:649)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:619)
at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(Unknown Source)
at sun.rmi.transport.StreamRemoteCall.executeCall(Unknown Source)
at sun.rmi.server.UnicastRef.invoke(Unknown Source)
at org.jboss.invocation.jrmp.server.JRMPInvoker_Stub.invoke(Unknown Source)
at org.jboss.invocation.jrmp.interfaces.JRMPInvokerProxy.invoke(JRMPInvokerProxy.java:133)
at org.jboss.invocation.InvokerInterceptor.invokeInvoker(InvokerInterceptor.java:365)
at org.jboss.invocation.InvokerInterceptor.invoke(InvokerInterceptor.java:197)
at org.jboss.proxy.ClientMethodInterceptor.invoke(ClientMethodInterceptor.java:74)
at org.jboss.proxy.ClientContainer.invoke(ClientContainer.java:101)
... 15 more
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16 years, 4 months