我正在使用表映射器和化简器对大规模问题进行一些测试。达到某一点后，当工作完成80％时，我的 reducer 开始出现故障。从查看系统日志时我可以看出，问题是我的一个动物园管理员正在尝试连接到本地主机，而不是仲裁中的其他动物园管理员。
奇怪的是，在进行映射时，似乎可以很好地连接到其他节点，从而减少了问题。这是syslog的选定部分，可能与找出正在发生的事情有关
2014-06-27 09:44:01,599 INFO [main] org.apache.zookeeper.ZooKeeper: Initiating client connection, connectString=hdev02:5181,hdev01:5181,hdev03:5181 sessionTimeout=10000 watcher=hconnection-0x4aee260b, quorum=hdev02:5181,hdev01:5181,hdev03:5181, baseZNode=/hbase
2014-06-27 09:44:01,612 INFO [main] org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper: Process identifier=hconnection-0x4aee260b connecting to ZooKeeper ensemble=hdev02:5181,hdev01:5181,hdev03:5181
2014-06-27 09:44:01,614 INFO [main-SendThread(hdev02:5181)] org.apache.zookeeper.ClientCnxn: Opening socket connection to server hdev02/172.17.43.36:5181. Will not attempt to authenticate using SASL (Unable to locate a login configuration)
2014-06-27 09:44:01,615 INFO [main-SendThread(hdev02:5181)] org.apache.zookeeper.ClientCnxn: Socket connection established to hdev02/172.17.43.36:5181, initiating session
2014-06-27 09:44:01,617 INFO [main-SendThread(hdev02:5181)] org.apache.zookeeper.ClientCnxn: Unable to read additional data from server sessionid 0x0, likely server has closed socket, closing socket connection and attempting reconnect
2014-06-27 09:44:01,723 WARN [main] org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper: Possibly transient ZooKeeper, quorum=hdev02:5181,hdev01:5181,hdev03:5181, exception=org.apache.zookeeper.KeeperException$ConnectionLossException: KeeperErrorCode = ConnectionLoss for /hbase/hbaseid
2014-06-27 09:44:01,723 INFO [main] org.apache.hadoop.hbase.util.RetryCounter: Sleeping
***
org.apache.hadoop.mapreduce.task.reduce.MergeManagerImpl: finalMerge called with 1 in-memory map-outputs and 1 on-disk map-outputs
2014-06-27 09:55:12,012 INFO [main] org.apache.hadoop.mapred.Merger: Merging 1 sorted segments
2014-06-27 09:55:12,013 INFO [main] org.apache.hadoop.mapred.Merger: Down to the last merge-pass, with 1 segments left of total size: 33206049 bytes
2014-06-27 09:55:12,208 INFO [main] org.apache.hadoop.mapreduce.task.reduce.MergeManagerImpl: Merged 1 segments, 33206079 bytes to disk to satisfy reduce memory limit
2014-06-27 09:55:12,209 INFO [main] org.apache.hadoop.mapreduce.task.reduce.MergeManagerImpl: Merging 2 files, 265119413 bytes from disk
2014-06-27 09:55:12,209 INFO [main] org.apache.hadoop.mapreduce.task.reduce.MergeManagerImpl: Merging 0 segments, 0 bytes from memory into reduce
2014-06-27 09:55:12,210 INFO [main] org.apache.hadoop.mapred.Merger: Merging 2 sorted segments
2014-06-27 09:55:12,212 INFO [main] org.apache.hadoop.mapred.Merger: Down to the last merge-pass, with 2 segments left of total size: 265119345 bytes
2014-06-27 09:55:12,279 INFO [main] org.apache.zookeeper.ZooKeeper: Initiating client connection, connectString=localhost:2181 sessionTimeout=90000 watcher=hconnection-0x65afdbbb, quorum=localhost:2181, baseZNode=/hbase
2014-06-27 09:55:12,281 INFO [main] org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper: Process identifier=hconnection-0x65afdbbb connecting to ZooKeeper ensemble=localhost:2181
2014-06-27 09:55:12,282 INFO [main-SendThread(localhost.localdomain:2181)] org.apache.zookeeper.ClientCnxn: Opening socket connection to server localhost.localdomain/127.0.0.1:2181. Will not attempt to authenticate using SASL (Unable to locate a login configuration)
2014-06-27 09:55:12,283 WARN [main-SendThread(localhost.localdomain:2181)] org.apache.zookeeper.ClientCnxn: Session 0x0 for server null, unexpected error, closing socket connection and attempting reconnect
java.net.ConnectException: Connection refused
at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:599)
at org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:350)
at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1068)
2014-06-27 09:55:12,384 WARN [main] org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper: Possibly transient ZooKeeper, quorum=localhost:2181, exception=org.apache.zookeeper.KeeperException$ConnectionLossException: KeeperErrorCode = ConnectionLoss for /hbase/hbaseid
2014-06-27 09:55:12,384 INFO [main] org.apache.hadoop.hbase.util.RetryCounter: Sleeping 1000ms before retry #0...
2014-06-27 09:55:13,385 INFO [main-SendThread(localhost.localdomain:2181)] org.apache.zookeeper.ClientCnxn: Opening socket connection to server localhost.localdomain/127.0.0.1:2181. Will not attempt to authenticate using SASL (Unable to locate a login configuration)
2014-06-27 09:55:13,385 WARN [main-SendThread(localhost.localdomain:2181)] org.apache.zookeeper.ClientCnxn: Session 0x0 for server null, unexpected error, closing
***
org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper: Possibly transient ZooKeeper, quorum=localhost:2181, exception=org.apache.zookeeper.KeeperException$ConnectionLossException: KeeperErrorCode = ConnectionLoss for /hbase/hbaseid
2014-06-27 09:55:13,486 ERROR [main] org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper: ZooKeeper exists failed after 1 attempts
2014-06-27 09:55:13,486 WARN [main] org.apache.hadoop.hbase.zookeeper.ZKUtil: hconnection-0x65afdbbb, quorum=localhost:2181, baseZNode=/hbase Unable to set watcher on znode (/hbase/hbaseid)
org.apache.zookeeper.KeeperException$ConnectionLossException: KeeperErrorCode = ConnectionLoss for /hbase/hbaseid
我很确定它的配置正确，这是我的hbase-site.xml的相关部分。
<property>
<name>hbase.zookeeper.property.clientPort</name>
<value>5181</value>
<description>Property from ZooKeeper's config zoo.cfg.
The port at which the clients will connect.
</description>
</property>
<property>
<name>zookeeper.session.timeout</name>
<value>10000</value>
<description></description>
</property>
<property>
<name>hbase.client.retries.number</name>
<value>10</value>
<description></description>
</property>
<property>
<name>hbase.zookeeper.quorum</name>
<value>hdev01,hdev02,hdev03</value>
<description></description>
</property>
据我所知，hdev03是唯一与此相关的服务器。 Netstating所有相关端口不会显示任何奇怪的信息。
最佳答案
当通过Yarn上的Spark运行HBase时，我遇到了同样的问题。一切都很好，直到突然开始尝试连接到本地主机而不是仲裁。在HBase调用之前以编程方式设置端口和仲裁可以解决此问题
conf.set("hbase.zookeeper.quorum","my.server")
conf.set("hbase.zookeeper.property.clientPort","5181")
我正在使用MapR，并且它具有“异常”(5181)的Zookeeper端口