TCP_NIO support is impacted by a Sun Java bug during TCP_NIO shutdown operation ------------------------------------------------------------------------------- Key: JGRP-252 URL: http://jira.jboss.com/jira/browse/JGRP-252 Project: JGroups Issue Type: Sub-task Affects Versions: 2.4 Environment: Novell Linux Desktop Linux smarlow 2.6.5-7.243-default #1 Mon Dec 5 21:08:42 UTC 2005 i686 i686 i386 GNU/Linux Reporter: Scott Marlow Assigned To: Scott Marlow Priority: Minor Attachments: config.txt, sendernio.sh, tcp_nio.xml During TCP_NIO, I used to ignore exceptions thrown while closing connections at shutdown time. I changed this for the 2.4 release, however, there seems to be a Java bug that Sun just fixed in Mustang build 89. I verified that the Sun fix works by downloading jdk-6-rc-bin-b89-linux-i586-22_jun_2006.bin from http://download.java.net/jdk6/binaries/ and running the org.jgroups.tests.perf.Test. I asked my support contact at Sun if they could also fix this bug in the Java 5 release, I'll update this bug when I hear the answer. I created this Jira to track the issue since others will likely see the same problem. When Sun reports back their plans for a Java5 fix, I'll update this Jira. The Sun bug id is supposed to be 6445262 but I cannot seem to find that on the Java bug parade (perhaps its marked private.) Run the attached script files to recreate. The stack trace below shows that the unexpected error occurs when we attempt to close the channel (socket connection): SEVERE: error closing socket connection java.io.IOException: Invalid argument at sun.nio.ch.NativeThread.signal(Native Method) at sun.nio.ch.SocketChannelImpl.implCloseSelectableChannel(SocketChannelImpl.java:634) at java.nio.channels.spi.AbstractSelectableChannel.implCloseChannel(AbstractSelectableChannel.java:201) at java.nio.channels.spi.AbstractInterruptibleChannel.close(AbstractInterruptibleChannel.java:97) at org.jgroups.blocks.ConnectionTableNIO$Connection.closeSocket(ConnectionTableNIO.java:913) at org.jgroups.blocks.ConnectionTableNIO$Connection.destroy(ConnectionTableNIO.java:880) at org.jgroups.blocks.ConnectionTableNIO.stop(ConnectionTableNIO.java:312) at org.jgroups.protocols.TCP_NIO.stop(TCP_NIO.java:71) at org.jgroups.stack.Protocol.handleSpecialDownEvent(Protocol.java:604) at org.jgroups.stack.Protocol.receiveDownEvent(Protocol.java:514) at org.jgroups.stack.Protocol.passDown(Protocol.java:551) at org.jgroups.protocols.Discovery.down(Discovery.java:333) at org.jgroups.stack.Protocol.receiveDownEvent(Protocol.java:517) at org.jgroups.stack.Protocol.passDown(Protocol.java:551) at org.jgroups.protocols.FD_SOCK.down(FD_SOCK.java:395) at org.jgroups.stack.Protocol.receiveDownEvent(Protocol.java:517) at org.jgroups.stack.Protocol.passDown(Protocol.java:551) at org.jgroups.protocols.pbcast.NAKACK.down(NAKACK.java:480) at org.jgroups.stack.Protocol.receiveDownEvent(Protocol.java:517) at org.jgroups.stack.Protocol.passDown(Protocol.java:551) at org.jgroups.protocols.pbcast.STABLE.down(STABLE.java:283) at org.jgroups.stack.Protocol.receiveDownEvent(Protocol.java:517) at org.jgroups.stack.Protocol.passDown(Protocol.java:551) at org.jgroups.protocols.VIEW_SYNC.down(VIEW_SYNC.java:166) at org.jgroups.stack.Protocol.receiveDownEvent(Protocol.java:517) at org.jgroups.stack.Protocol.passDown(Protocol.java:551) at org.jgroups.protocols.pbcast.GMS.down(GMS.java:797) at org.jgroups.stack.Protocol.receiveDownEvent(Protocol.java:517) at org.jgroups.stack.ProtocolStack.down(ProtocolStack.java:385) at org.jgroups.stack.ProtocolStack.stopStack(ProtocolStack.java:324) at org.jgroups.JChannel._close(JChannel.java:1286) at org.jgroups.JChannel.shutdown(JChannel.java:492) at org.jgroups.tests.perf.transports.JGroupsTransport.stop(JGroupsTransport.java:59) at org.jgroups.tests.perf.Test.stop(Test.java:208) at org.jgroups.tests.perf.Test.main(Test.java:705)