HBase0.9x问题总结

1.最近hbase的rgion经常挂掉一个，查看该节点日志发现如下错误： 2014-02-22 01:52:02,194 ERROR org.apache.Hadoop.hbase.regio

1.最近hbase的rgion经常挂掉一个，查看该节点日志发现如下错误：

2014-02-22 01:52:02,194 ERROR org.apache.Hadoop.hbase.regionserver.HRegionServer: Close and delete failed

org.apache.hadoop.hdfs.server.namenode.LeaseExpiredException: org.apache.hadoop.hdfs.server.namenode.LeaseExpiredException: No lease on /hbase/.logs/testhd3,60020,1392948100268/testhd3%2C60020%2C1392948100268.1393004989411 File does not exist. Holder DFSClient_hb_rs_testhd3,60020,1392948100268 does not have any open files.

at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkLease(FSNamesystem.java:1631)

at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkLease(FSNamesystem.java:1622)

查了很长时间也没找到hbase的问题，后来根据网上资料查看了hadoop的日志如下：

2014-02-22 01:52:00,935 ERROR org.apache.hadoop.security.UserGroupInformation: PriviledgedActionException as:hadoop cause:org.apache.hadoop.hdfs.server.namenode.LeaseExpiredException: No lease on /hbase/.logs/testhd3,60020,1392948100268/testhd3%2C60020%2C1392948100268.1393004989411 File does not exist. Holder DFSClient_hb_rs_testhd3,60020,1392948100268 does not have any open files.

2014-02-22 01:52:00,936 INFO org.apache.hadoop.ipc.Server: IPC Server handler 3 on 9000, call addBlock(/hbase/.logs/testhd3,60020,1392948100268/testhd3%2C60020%2C1392948100268.1393004989411, DFSClient_hb_rs_testhd3,60020,1392948100268, null) from 172.72.101.213:59979: error: org.apache.hadoop.hdfs.server.namenode.LeaseExpiredException: No lease on /hbase/.logs/testhd3,60020,1392948100268/testhd3%2C60020%2C1392948100268.1393004989411 File does not exist. Holder DFSClient_hb_rs_testhd3,60020,1392948100268 does not have any open files.

org.apache.hadoop.hdfs.server.namenode.LeaseExpiredException: No lease on /hbase/.logs/testhd3,60020,1392948100268/testhd3%2C60020%2C1392948100268.1393004989411 File does not exist. Holder DFSClient_hb_rs_testhd3,60020,1392948100268 does not have any open files.

at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkLease(FSNamesystem.java:1631)

at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkLease(FSNamesystem.java:1622)

结果发现两个日志有几乎相同的记录，可以确认hbase的问题是由hadoop引起，修改如下：

解决办法，调整xcievers参数

默认是4096，改为8192

vi /home/dwhftp/opt/hadoop/conf/hdfs-site.xml

dfs.datanode.max.xcievers

8192

dfs.datanode.max.xcievers 参数说明

一个 Hadoop HDFS Datanode 有一个同时处理文件的上限. 这个参数叫 xcievers (Hadoop的作者把这个单词拼错了). 在你加载之前，先确认下你有没有配置这个文件conf/hdfs-site.xml里面的xceivers参数，至少要有4096:

dfs.datanode.max.xcievers

4096

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