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https://issues.apache.org/jira/browse/ZOOKEEPER-1560?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13475085#comment-13475085
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Eugene Koontz commented on ZOOKEEPER-1560:
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It seems like in a particular iteration, 0 bytes is written:
{code}
localhost/127.0.0.1:11222, unexpected error, closing socket connection and
attempting reconnect
[exec] [junit] java.io.IOException: Couldn't write 2000 bytes, 0 bytes
written in this iteration and 77152 bytes written in total. Original limit:
500074
[exec] [junit] at
org.apache.zookeeper.ClientCnxnSocketNIO.doIO(ClientCnxnSocketNIO.java:145)
[exec] [junit] at
org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:375)
[exec] [junit] at
org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1068)
[exec] [junit] 2012-10-12 15:20:42,629 [myid:] - WARN
[NIOServerCxn.Factory:0.0.0.0/0.0.0.0:11222:NIOServerCnxn@349] - caught end of
stream exception
[exec] [junit] EndOfStreamException: Unable to read additional data
from client sessionid 0x13a55902b650001, likely client has closed socket
[exec] [junit] at
org.apache.zookeeper.server.NIOServerCnxn.doIO(NIOServerCnxn.java:220)
[exec] [junit] at
org.apache.zookeeper.server.NIOServerCnxnFactory.run(NIOServerCnxnFactory.java:208)
[exec] [junit] at java.lang.Thread.run(Thread.java:662)
[exec] [junit] 2012-10-12 15:20:42,630 [myid:] - INFO
[NIOServerCxn.Factory:0.0.0.0/0.0.0.0:11222:NIOServerCnxn@1001] - Closed socket
connection for client /127.0.0.1:57126 which had sessionid 0x13a55902b650001
{code}
Seems like there's a strange resemblance among all the test failures thus far:
always fails after 77152 bytes written.
> Zookeeper client hangs on creation of large nodes
> -------------------------------------------------
>
> Key: ZOOKEEPER-1560
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-1560
> Project: ZooKeeper
> Issue Type: Bug
> Components: java client
> Affects Versions: 3.4.4, 3.5.0
> Reporter: Igor Motov
> Assignee: Ted Yu
> Fix For: 3.5.0, 3.4.5
>
> Attachments: ZOOKEEPER-1560.patch, zookeeper-1560-v1.txt,
> zookeeper-1560-v2.txt, zookeeper-1560-v3.txt, zookeeper-1560-v4.txt,
> zookeeper-1560-v5.txt, zookeeper-1560-v6.txt
>
>
> To reproduce, try creating a node with 0.5M of data using java client. The
> test will hang waiting for a response from the server. See the attached patch
> for the test that reproduces the issue.
> It seems that ZOOKEEPER-1437 introduced a few issues to
> {{ClientCnxnSocketNIO.doIO}} that prevent {{ClientCnxnSocketNIO}} from
> sending large packets that require several invocations of
> {{SocketChannel.write}} to complete. The first issue is that the call to
> {{outgoingQueue.removeFirstOccurrence(p);}} removes the packet from the queue
> even if the packet wasn't completely sent yet. It looks to me that this call
> should be moved under {{if (!pbb.hasRemaining())}} The second issue is that
> {{p.createBB()}} is reinitializing {{ByteBuffer}} on every iteration, which
> confuses {{SocketChannel.write}}. And the third issue is caused by extra
> calls to {{cnxn.getXid()}} that increment xid on every iteration and confuse
> the server.
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