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Posted to dev@directory.apache.org by "Julien Vermillard (JIRA)" <ji...@apache.org> on 2005/05/27 09:25:52 UTC
[jira] Commented: (DIRMINA-47) NullPointerException in SocketIoProcessor
[ http://issues.apache.org/jira/browse/DIRMINA-47?page=comments#action_66431 ]
Julien Vermillard commented on DIRMINA-47:
------------------------------------------
what are you exactly doing for closing and creating new ProtocolSession ? The ProtocolSession with NULL selection keys is the newly opened one or the closed one ?
> NullPointerException in SocketIoProcessor
> -----------------------------------------
>
> Key: DIRMINA-47
> URL: http://issues.apache.org/jira/browse/DIRMINA-47
> Project: Directory MINA
> Type: Bug
> Versions: 0.7.1
> Reporter: Trustin Lee
> Assignee: Trustin Lee
> Fix For: 0.7.2
>
> Adam Hathcock wrote:
> java.lang.NullPointerException
> at org.apache.mina.io.socket.SocketIoProcessor.flush(SocketIoProcessor.java:496)
> at org.apache.mina.io.socket.SocketIoProcessor.flushSessions(SocketIoProcessor.java:402)
> at org.apache.mina.io.socket.SocketIoProcessor.access$3(SocketIoProcessor.java:377)
> at org.apache.mina.io.socket.SocketIoProcessor$Worker.run(SocketIoProcessor.java:525)
> is error I'm running into and I'm unsure of the cause. I am closing ProtocolSessions and creating new ones which may have something to do with it. I also use the DemuxingProtocolCodecFactory to manage my protocol messages as well as their encoding and decoding.
> I cannot figure out how the session's SelectionKey is becoming null. I am using a checkout of the 0.7 branch from earlier today.
> This error occurs after I create a new connection and start using the ProtocolSession. I'm still not sure what causes it but everything appears to still work if I put a try/catch for a NullPointerException in the SocketIoProcessor around line 496
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Re: [jira] Commented: (DIRMINA-47) NullPointerException in SocketIoProcessor
Posted by Adam Hathcock <ha...@auburn.edu>.
here is a little more detail:
closed 1 IAL-G5.local/10.0.0.107:1032 /10.0.0.107:52748
connect created 4 /10.0.0.107:10333 /10.0.0.107:52755
org.apache.mina.protocol.io.IoProtocolSession@3e15f7
4
java.lang.NullPointerException
at org.apache.mina.io.socket.SocketIoProcessor.flush
(SocketIoProcessor.java:497)
at org.apache.mina.io.socket.SocketIoProcessor.flushSessions
(SocketIoProcessor.java:402)
at org.apache.mina.io.socket.SocketIoProcessor.access$3
(SocketIoProcessor.java:377)
at org.apache.mina.io.socket.SocketIoProcessor$Worker.run
(SocketIoProcessor.java:530)
I'm using local instances of the same program to test it. The nodes
can join and leave a Chord ring in a p2p style so that the network
will stay alive while individual nodes are added or shutdown. I am
closing a connect with an attachment of a static Integer of 1, just
to keep track of what it is. I create a new connection with static
Integer of 4 (just happens to be the 4th one I create). The creation
itself seems to trigger the error. Usually after this connection is
made, there is a wait period before it is used.
Sample code that hopefully makes sense out of context:
public void connectToPredecessor() throws IOException {
if (this.predecessorSession != null) {
this.predecessorSession.close();
System.out.println("closed " +
predecessorSession.getAttachment() + " " +
predecessorSession.getRemoteAddress() + " " +
predecessorSession.getLocalAddress());
}
this.predecessorSession = connect(this.getPredecessorAddress
());
}
public ProtocolSession connect(SocketAddress address) throws
IOException {
IoProtocolConnector connector = new IoProtocolConnector(new
SocketConnector());
ProtocolSession session = connector.connect(address, 60,
getProvider());
session.setAttachment(ChordUtil.getCount());
System.out.println("connect created " + session.getAttachment
() + " " + session.getRemoteAddress() + " " + session.getLocalAddress
());
return session;
}
The connectToPredecessor method is only done if I'm sure a new
address was set. Like I said, I could be misusing MINA but its just
odd that everything seems to work fine. I'll try to make a test case
soon.
On May 27, 2005, at 2:25 AM, Julien Vermillard (JIRA) wrote:
> [ http://issues.apache.org/jira/browse/DIRMINA-47?
> page=comments#action_66431 ]
>
> Julien Vermillard commented on DIRMINA-47:
> ------------------------------------------
>
> what are you exactly doing for closing and creating new
> ProtocolSession ? The ProtocolSession with NULL selection keys is
> the newly opened one or the closed one ?
>
>
>> NullPointerException in SocketIoProcessor
>> -----------------------------------------
>>
>> Key: DIRMINA-47
>> URL: http://issues.apache.org/jira/browse/DIRMINA-47
>> Project: Directory MINA
>> Type: Bug
>> Versions: 0.7.1
>> Reporter: Trustin Lee
>> Assignee: Trustin Lee
>> Fix For: 0.7.2
>>
>
>
>>
>> Adam Hathcock wrote:
>> java.lang.NullPointerException
>> at org.apache.mina.io.socket.SocketIoProcessor.flush
>> (SocketIoProcessor.java:496)
>> at org.apache.mina.io.socket.SocketIoProcessor.flushSessions
>> (SocketIoProcessor.java:402)
>> at org.apache.mina.io.socket.SocketIoProcessor.access$3
>> (SocketIoProcessor.java:377)
>> at org.apache.mina.io.socket.SocketIoProcessor$Worker.run
>> (SocketIoProcessor.java:525)
>> is error I'm running into and I'm unsure of the cause. I am
>> closing ProtocolSessions and creating new ones which may have
>> something to do with it. I also use the
>> DemuxingProtocolCodecFactory to manage my protocol messages as
>> well as their encoding and decoding.
>> I cannot figure out how the session's SelectionKey is becoming
>> null. I am using a checkout of the 0.7 branch from earlier today.
>> This error occurs after I create a new connection and start using
>> the ProtocolSession. I'm still not sure what causes it but
>> everything appears to still work if I put a try/catch for a
>> NullPointerException in the SocketIoProcessor around line 496
>>
>
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