501 is userid, not pid. The old pid file was deleted after the unsuccessful kill attempt. Maybe we should keep the pid file if we are unable to kill. Alternatively, we can use ps command to find org.apache.zookeeper.server.quorum.QuorumPeerMain instance.
We use Tanuki wrapper around zk. zookeeper is started automatically after reboot last night. See /etc/rc3.d/S20zk-wrapper.sh in attachment I will report the issue if it happens again. BTW There are several unresolved issues for zk 3.3.0 When can we expect zk 3.3.0 to be released ? Thanks On Tue, Mar 9, 2010 at 9:56 AM, Patrick Hunt <ph...@apache.org> wrote: > That does seem unusual. Notice the pid of the current jvm is 501, while the > killed jvm is 6826. Is this 501 jvm created before 6826 or has the pid > "rolled over". Hard for me to tell... Are you running the std zkServer.sh > unmodified? > > A shot in the dark: Permission issue? (i.e. zkStart failed to overwrite an > old/existing pid file due to file permissions). Perhaps something started > the server twice before stopping? > > Can you reproduce this? If you do please report the issue here: > https://issues.apache.org/jira/browse/ZOOKEEPER > > Patrick > > > Ted Yu wrote: > >> Hi, >> We use zookeeper-3.2.1 >> >> When I tested ruok : >> 2010-03-09 08:56:36,711 INFO [NIOServerCxn.Factory:2181] >> server.NIOServerCnxn Processing ruok command from /10.10.31.135:57084 >> 2010-03-09 08:56:36,711 WARN [NIOServerCxn.Factory:2181] >> server.NIOServerCnxn Exception causing close of session 0x0 due to >> java.io.IOException: Responded to info probe >> 2010-03-09 08:56:36,711 INFO [NIOServerCxn.Factory:2181] >> server.NIOServerCnxn closing session:0x0 NIOServerCnxn: >> java.nio.channels.SocketChannel[connected local=/10.10.31.135:2181remote=/ >> 10.10.31.135:57084] >> >> [r...@snv-it-lin-010 software]# bin/zkServer.sh stop >> JMX enabled by default >> Using config: /opt/kindsight/zookeeper/software/bin/../conf/zoo.cfg >> Stopping zookeeper ... >> bin/zkServer.sh: line 80: kill: (6826) - No such process >> STOPPED >> >> I wonder why pidfile held an invalid pid: >> 501 4190 0.5 4.9 1523960 814644 ? Sl Mar08 3:48 >> /usr/local/jdk1.6.0_14/bin/java -Dcom.sun.management.jmxremote -Xms100m >> -Xmx1000m -Djava.library.path=lib -classpath >> >> lib/wrapper.jar:lib/zabbix_common.jar:zookeeper-3.2.1.jar:lib/log4j-1.2.15.jar:lib/3rdparty/slf4j/jcl104-over-slf4j-1.5.0.jar:lib/3rdparty/slf4j/slf4j-api-1.5.0.jar:lib/3rdparty/slf4j/slf4j-log4j12-1.5.0.jar:lib/3rdparty/ognl/ognl-2.6.9.jar:conf >> -Dwrapper.key=fcnqS87eXW_Tp5xC -Dwrapper.port=32005 >> -Dwrapper.jvm.port.min=31000 -Dwrapper.jvm.port.max=31999 >> -Dwrapper.pid=4160 >> -Dwrapper.version=3.2.3 -Dwrapper.native_library=wrapper >> -Dwrapper.service=TRUE -Dwrapper.cpu.timeout=10 -Dwrapper.jvmid=1 >> org.tanukisoftware.wrapper.WrapperSimpleApp >> com.rialto.common.zabbix.ZabbixWrapper >> org.apache.zookeeper.server.quorum.QuorumPeerMain conf/zoo.cfg >> >> Can someone comment ? >> >> On Mon, Mar 8, 2010 at 10:25 AM, Patrick Hunt <ph...@apache.org> wrote: >> >> Donno if you noticed but ZK 3.3.0 (releasing this month) changes that >>> message to an info. I'm hoping it reduces these types of false positives. >>> :-) Not sure why we had it as warn, but that was wrong. >>> >>> Patrick >>> >>> >>> Jean-Daniel Cryans wrote: >>> >>> HBase relies on exception like those when creating a znode eg "create >>>> znode x, if NodeExists then update its value". >>>> >>>> J-D >>>> >>>> On Sun, Mar 7, 2010 at 3:49 AM, Ahmed Suhail Manzoor >>>> <suhail...@gmail.com> wrote: >>>> >>>> Hi, >>>>> >>>>> I am hoping someone can help me with a zookeeper setup. I am running >>>>> Zookeeper wih export HBASE_MANAGES_ZK=false and start it using >>>>> bin/hbase >>>>> zookeeper. It starts up fine. However when I start up Hbase I get the >>>>> following in my log file: >>>>> >>>>> 10/03/07 11:41:35 WARN server.PrepRequestProcessor: Got exception when >>>>> processing sessionid:0x127386d00840000 type:create cxid:0x12 >>>>> zxid:0xfffffffffffffffe txntype:unknown n/a >>>>> org.apache.zookeeper.KeeperException$NodeExistsException: >>>>> KeeperErrorCode >>>>> = >>>>> NodeExists >>>>> at >>>>> >>>>> >>>>> org.apache.zookeeper.server.PrepRequestProcessor.pRequest(PrepRequestProcessor.java:245) >>>>> at >>>>> >>>>> >>>>> org.apache.zookeeper.server.PrepRequestProcessor.run(PrepRequestProcessor.java:114) >>>>> >>>>> I know its only a warning but I would like someone to shed some light >>>>> on >>>>> it >>>>> so I can be confident that my installation is correct. Thank you kindly >>>>> for >>>>> your help. >>>>> >>>>> Cheers >>>>> su./hail >>>>> >>>>> >>>>> >>>>> >>
S20zk-wrapper.sh
Description: Bourne shell script
