namenode 格式化错误 Unable to check if JNs are ready for formatting
bin/hadoop namenode -format 时候出现以下错误 org.apache.hadoop.hdfs.qjournal.client.QuorumException: Unable to check if JNs are ready for formatting. n
15/12/04 04:52:50 WARN namenode.NameNode: Encountered exception during format:
org.apache.hadoop.hdfs.qjournal.client.QuorumException: Unable to check if JNs are ready for formatting. 3 exceptions thrown:
10.165.114.138:8485: Call From hd1/10.172.153.46 to hd3:8485 failed on connection exception: java.net.ConnectException: Connection refused; For more details see: http://wiki.apache.org/hadoop/ConnectionRefused
10.172.218.18:8485: Call From hd1/10.172.153.46 to hd2:8485 failed on connection exception: java.net.ConnectException: Connection refused; For more details see: http://wiki.apache.org/hadoop/ConnectionRefused
10.172.153.46:8485: Call From hd1/10.172.153.46 to hd1:8485 failed on connection exception: java.net.ConnectException: Connection refused; For more details see: http://wiki.apache.org/hadoop/ConnectionRefused
at 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:884)
at org.apache.hadoop.hdfs.server.namenode.FSImage.confirmFormat(FSImage.java:171)
at org.apache.hadoop.hdfs.server.namenode.NameNode.format(NameNode.java:937)
at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1379)
at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1504)
15/12/04 04:52:50 FATAL namenode.NameNode: Failed to start namenode.
org.apache.hadoop.hdfs.qjournal.client.QuorumException: Unable to check if JNs are ready for formatting. 3 exceptions thrown:
10.165.114.138:8485: Call From hd1/10.172.153.46 to hd3:8485 failed on connection exception: java.net.ConnectException: Connection refused; For more details see: http://wiki.apache.org/hadoop/ConnectionRefused
10.172.218.18:8485: Call From hd1/10.172.153.46 to hd2:8485 failed on connection exception: java.net.ConnectException: Connection refused; For more details see: http://wiki.apache.org/hadoop/ConnectionRefused
10.172.153.46:8485: Call From hd1/10.172.153.46 to hd1:8485 failed on connection exception: java.net.ConnectException: Connection refused; For more details see: http://wiki.apache.org/hadoop/ConnectionRefused
at 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:884)
at org.apache.hadoop.hdfs.server.namenode.FSImage.confirmFormat(FSImage.java:171)
at org.apache.hadoop.hdfs.server.namenode.NameNode.format(NameNode.java:937)
at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1379)
at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1504)
15/12/04 04:52:50 INFO util.ExitUtil: Exiting with status 1
15/12/04 04:52:50 INFO namenode.NameNode: SHUTDOWN_MSG:
/************************************************************
SHUTDOWN_MSG: Shutting down NameNode at hd1/10.172.153.46
************************************************************/
解决方案一：
在各JournalNode节点上，输入以下命令启动journalnode服务：
sbin/hadoop-daemon.sh start journalnode:
然后格式化就没问题了
解决方案二：
HA模式第一次或删除格式化版本后格式化失败，报如上错误：
解决方案：
先启动 ./start-dfs.sh
再进行 格式化，则成功
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