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https://issues.apache.org/jira/browse/ZOOKEEPER-513?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12766378#action_12766378
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Mahadev konar commented on ZOOKEEPER-513:
-----------------------------------------

just noticed the CONNECTION REFUSED error at 03:09:20,309:3813. This probably 
indicates that the server went down (the process wasnt running).

Qian,
 As pat mentioned, can you upload the server logs during this time? 


> C client disconnect with stand-alone server abnormally
> ------------------------------------------------------
>
>                 Key: ZOOKEEPER-513
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-513
>             Project: Zookeeper
>          Issue Type: Bug
>          Components: c client
>    Affects Versions: 3.2.0
>         Environment: Linux 2.6.9-52bs #2 SMP Fri Jan 26 13:34:38 CST 2007 
> x86_64 x86_64 x86_64 GNU/Linux
> Jdk: 1.6.0_14
>            Reporter: Qian Ye
>             Fix For: 3.3.0
>
>
> The client which created an ephemeral node at the zookeeper server, printed 
> the following log
> WARNING: 08-20 03:09:20:  auto * 182894118176 
> [logid:][reqip:][auto_exchanger_zk_basic.cpp:605]get children 
> fail.[/forum/elect_nodes][-7][operation timeout]
> and the Zookeeper client printed the following log (the log level is INFO)
> 2009-08-19 21:36:18,067:3813(0x9556c520):zoo_i...@log_env@545: Client 
> environment:zookeeper.version=zookeeper C client 3.2.0
>     606 2009-08-19 21:36:18,067:3813(0x9556c520):zoo_i...@log_env@549: Client 
> environment:host.name=jx-ziyuan-test00.jx.baidu.com
>     607 2009-08-19 21:36:18,068:3813(0x9556c520):zoo_i...@log_env@557: Client 
> environments.name=Linux
>     608 2009-08-19 21:36:18,068:3813(0x9556c520):zoo_i...@log_env@558: Client 
> environments.arch=2.6.9-52bs
>     609 2009-08-19 21:36:18,068:3813(0x9556c520):zoo_i...@log_env@559: Client 
> environments.version=#2 SMP Fri Jan 26 13:34:38 CST 2007
>     610 2009-08-19 21:36:18,068:3813(0x9556c520):zoo_i...@log_env@567: Client 
> environment:user.name=club
>     611 2009-08-19 21:36:18,068:3813(0x9556c520):zoo_i...@log_env@577: Client 
> environment:user.home=/home/club
>     612 2009-08-19 21:36:18,068:3813(0x9556c520):zoo_i...@log_env@589: Client 
> environment:user.dir=/home/club/user/luhongbo/auto-exchanger
>     613 2009-08-19 21:36:18,068:3813(0x9556c520):zoo_i...@zookeeper_init@613: 
> Initiating client connection, host=127.0.0.1:2181,127.0.0.1:2182 
> sessionTimeout=2000 wa        tcher=0x408c56 sessionId=0x0 
> sessionPasswd=<null> context=(nil) flags=0
>     614 2009-08-19 21:36:18,069:3813(0x41401960):zoo_i...@check_events@1439: 
> initiated connection to server [127.0.0.1:2181]
>     615 2009-08-19 21:36:18,070:3813(0x41401960):zoo_i...@check_events@1484: 
> connected to server [127.0.0.1:2181] with session id=1232c1688a20093
>     616 2009-08-20 
> 02:48:01,780:3813(0x41401960):zoo_w...@zookeeper_interest@1335: Exceeded 
> deadline by 520ms
>     617 2009-08-20 
> 03:08:52,332:3813(0x41401960):zoo_w...@zookeeper_interest@1335: Exceeded 
> deadline by 14ms
>     618 2009-08-20 
> 03:09:04,666:3813(0x41401960):zoo_w...@zookeeper_interest@1335: Exceeded 
> deadline by 48ms
>     619 2009-08-20 
> 03:09:09,733:3813(0x41401960):zoo_w...@zookeeper_interest@1335: Exceeded 
> deadline by 24ms
>     620 2009-08-20 
> 03:09:20,289:3813(0x41401960):zoo_w...@zookeeper_interest@1335: Exceeded 
> deadline by 264ms
>     621 2009-08-20 
> 03:09:20,295:3813(0x41401960):zoo_er...@handle_socket_error_msg@1388: Socket 
> [127.0.0.1:2181] zk retcode=-7, errno=110(Connection timed out): conn        
> ection timed out (exceeded timeout by 264ms)
>     622 2009-08-20 
> 03:09:20,309:3813(0x41401960):zoo_w...@zookeeper_interest@1335: Exceeded 
> deadline by 284ms
>     623 2009-08-20 
> 03:09:20,309:3813(0x41401960):zoo_er...@handle_socket_error_msg@1433: Socket 
> [127.0.0.1:2182] zk retcode=-4, errno=111(Connection refused): server         
> refused to accept the client
>     624 2009-08-20 03:09:20,353:3813(0x41401960):zoo_i...@check_events@1439: 
> initiated connection to server [127.0.0.1:2181]
>     625 2009-08-20 03:09:20,552:3813(0x41401960):zoo_i...@check_events@1484: 
> connected to server [127.0.0.1:2181] with session id=1232c1688a20093
> The problem happened at 03:09:20, it seems that the zookeeper refused to 
> accept the client, and I don't know why.
> the zoo.cfg is like:
> # The number of milliseconds of each tick
> tickTime=500
> # The number of ticks that the initial 
> # synchronization phase can take
> initLimit=10
> # The number of ticks that can pass between 
> # sending a request and getting an acknowledgement
> syncLimit=5
> # the directory where the snapshot is stored.
> dataDir=./data/
> # the port at which the clients will connect
> clientPort=2181
> the C client used multi-thread library, and the session timeout is set to 
> 2000 when the zookeeper handler was initialized.

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