Hi, I built hadoop(0.20.1)+hbase(0.20.1) cluster structure(Master x 1, Slave x 4). And I tried following process to verify the behavior during system failure. Shut down one of the slave server, and start Hbase while I have a machine which cannot establish connection in the cluster. At the time, the following logs are outputted several times(3-8times) at intervals of 3 seconds in "hbase-hadoop-zookeeper-hmaster.log".
############################# 2009-12-18 19:52:40,709 WARN org.apache.zookeeper.server.quorum.QuorumCnxManager: Cannot open channel to 1 at election address hslave1.test.co.jp/192.168.1.25:3888 java.net.NoRouteToHostException: No route to host ############################# After all, when I verified the connection status using netstat command, connection has established among those running 4 server(Master x 1, Slave x 3), and WARN messages would stop. Though Log is output at interval of 3 seconds everytime,number of log is not constant(vary from 3 to 8 times). (I wonder if number of retry may not fixed in each boot?) To make the retrial frequency and the retry interval constant, I want to change Configuration. I changed the following parameters described in the zookeeper Admin manual. retrial frequency： [Hbase.zookeeper.property.tickTime] of $HBASE_HOME/conf/hbase-site.xml is changed to 3000->1. retry interval： Zookeeper.retries of $HBASE_HOME/conf/hbase-site.xml is changed to 5->1. However, the situation in which the WARN message is displayed in about three seconds is changeless. Moreover, the frequency to which LOG was output never changed by the setting, too. Please let me know that the valid following configuration parameters at the file in the conf directory of hbase. - The number of times of retry to The connection establishment to a server - The retry interval to The connection establishment to a server - The time-out period/value I hope someone could help me. My best regards. -- View this message in context: http://old.nabble.com/zookeeper-configuration-tp27127109p27127109.html Sent from the HBase User mailing list archive at Nabble.com.
