20140709 namenode bug2

Run the following command: Bin/HDFS namenode-format to format namenode:

14/07/09 17:12:49 warn namenode. namenode: encountered exception during format: Org. apache. hadoop. HDFS. qjournal. client. quorumexception: unable to check if JNS are ready for formatting. 1 EXCEPTIONS thrown: 192.168.56.200: 8485: call from hadoop0/192.168.56.200 to hadoop0: 8485 failed on connection exception: java.net. connectexception: Connection refused; for more details see: http://wiki.apache.org/hadoop/ConnectionRefusedat Org. apache. hadoop. HDFS. qjournal. client. quorumexception. create (quorumexception. java: 81) at Org. apache. hadoop. HDFS. qjournal. client. quorumcall. rethrowexception (quorumcall. java: 223) at Org. apache. hadoop. HDFS. qjournal. client. quorumjournalmanager. hassomedata (quorumjournalmanager. java: 232) at Org. apache. hadoop. HDFS. server. common. storage. confirmformat (storage. java: 871) at Org. apache. hadoop. HDFS. server. namenode. fsimage. confirmformat (fsimage. java: 171) at Org. apache. hadoop. HDFS. server. namenode. namenode. format (namenode. java: 841) at Org. apache. hadoop. HDFS. server. namenode. namenode. createnamenode (namenode. java: 1256) at Org. apache. hadoop. HDFS. server. namenode. namenode. main (namenode. java: 1370, 14/07/09 17:12:49 info IPC. client: retrying connect to server: hadoop1/192.168.56.201: 8485. already tried 9 time (s); retry policy is retryuptomaximumcountwithfixedsleep (maxretries = 10, sleeping time = 1000 milliseconds) 14/07/09 17:12:49 info IPC. client: retrying connect to server: hadoop2/192.168.56.202: 8485. already tried 9 time (s); retry policy is retryuptomaximumcountwithfixedsleep (maxretries = 10, sleeptime = 1000 milliseconds) 14/07/09 17:12:49 fatal namenode. namenode: exception in namenode joinorg. apache. hadoop. HDFS. qjournal. client. quorumexception: unable to check if JNS are ready for formatting. 1 EXCEPTIONS thrown: 192.168.56.200: 8485: call from hadoop0/192.168.56.200 to hadoop0: 8485 failed on connection exception: java.net. connectexception: Connection refused; for more details see: http://wiki.apache.org/hadoop/ConnectionRefusedat Org. apache. hadoop. HDFS. qjournal. client. quorumexception. create (quorumexception. java: 81) at Org. apache. hadoop. HDFS. qjournal. client. quorumcall. rethrowexception (quorumcall. java: 223) at Org. apache. hadoop. HDFS. qjournal. client. quorumjournalmanager. hassomedata (quorumjournalmanager. java: 232) at Org. apache. hadoop. HDFS. server. common. storage. confirmformat (storage. java: 871) at Org. apache. hadoop. HDFS. server. namenode. fsimage. confirmformat (fsimage. java: 171) at Org. apache. hadoop. HDFS. server. namenode. namenode. format (namenode. java: 841) at Org. apache. hadoop. HDFS. server. namenode. namenode. createnamenode (namenode. java: 1256) at Org. apache. hadoop. HDFS. server. namenode. namenode. main (namenode. java: 1370, 14/07/09 17:12:49 info util. exitutil: exiting with status 114/07/09 17:12:49 info namenode. namenode: shutdown_msg:

Cause: NN and NN are used for data sharing.Journalnode

Resolution: sbin/hadoop-daemon.sh start journalnode