spark怎么读取hbase表-创新互联

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一.场景:
    spark通过phoenix 读取hbase表，其实说白了先要去Zookeeper建立connection。

二.代码:

1. val zkUrl = "192.168.100.39,192.168.100.40,192.168.100.41:2181"
   

2. val formatStr = "org.apache.phoenix.spark"
   

3. val oms_orderinfoDF = spark.read.format(formatStr)
   

4.   .options(Map("table" -> "oms_orderinfo", "zkUrl" -> zkUrl))
   

5.   .load

三.查看SparkJob日志:

1. 17/10/24 03:25:25 INFO zookeeper.ClientCnxn: Opening socket connection to server hadoop40/192.168.100.40:2181. Will not attempt to authenticate using SASL (unknown error)

2. 17/10/24 03:25:25 INFO zookeeper.ClientCnxn: Socket connection established, initiating session, client: /192.168.100.48:35952, server: hadoop40/192.168.100.40:2181

3. 17/10/24 03:25:25 WARN zookeeper.ClientCnxn: Session 0x0 for server hadoop40/192.168.100.40:2181, unexpected error, closing socket connection and attempting reconnect

4. java.io.IOException: Connection reset by peer

5.     at sun.nio.ch.FileDispatcherImpl.read0(Native Method)

6.     at sun.nio.ch.SocketDispatcher.read(SocketDispatcher.java:39)

7.     at sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:223)

8.     at sun.nio.ch.IOUtil.read(IOUtil.java:192)

9.     at sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:380)

10.     at org.apache.phoenix.shaded.org.apache.zookeeper.ClientCnxnSocketNIO.doIO(ClientCnxnSocketNIO.java:68)

11.     at org.apache.phoenix.shaded.org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:355)

12.     at org.apache.phoenix.shaded.org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1081)

13. 17/10/24 03:25:25 INFO yarn.ApplicationMaster: Deleting staging directory hdfs://nameservice1/user/hdfs/.sparkStaging/application_1507703377455_4854

14. 17/10/24 03:25:25 INFO util.ShutdownHookManager: Shutdown hook called

四.查看Zookeeper日志:

1. 2017-10-24 03:25:22,498 WARN org.apache.zookeeper.server.NIOServerCnxnFactory: Too many connections from /192.168.100.40 - max is 500

2. 2017-10-24 03:25:25,588 WARN org.apache.zookeeper.server.NIOServerCnxnFactory: Too many connections from /192.168.100.40 - max is 500

3. 2017-10-24 03:25:25,819 WARN org.apache.zookeeper.server.NIOServerCnxnFactory: Too many connections from /192.168.100.40 - max is 500

4. 2017-10-24 03:25:26,092 WARN org.apache.zookeeper.server.NIOServerCnxn: caught end of stream exception

5. EndOfStreamException: Unable to read additional data from client sessionid 0x15ed091ee09897d, likely client has closed socket

6.     at org.apache.zookeeper.server.NIOServerCnxn.doIO(NIOServerCnxn.java:231)

7.     at org.apache.zookeeper.server.NIOServerCnxnFactory.run(NIOServerCnxnFactory.java:208)

8.     at java.lang.Thread.run(Thread.java:745)

9. 2017-10-24 03:25:26,092 INFO org.apache.zookeeper.server.NIOServerCnxn: Closed socket connection for client /192.168.100.40:47084 which had sessionid 0x15ed091ee09897d

10. 2017-10-24 03:25:26,092 WARN org.apache.zookeeper.server.NIOServerCnxn: caught end of stream exception

11. EndOfStreamException: Unable to read additional data from client sessionid 0x15ed091ee098981, likely client has closed socket

12.     at org.apache.zookeeper.server.NIOServerCnxn.doIO(NIOServerCnxn.java:231)

13.     at org.apache.zookeeper.server.NIOServerCnxnFactory.run(NIOServerCnxnFactory.java:208)

14.     at java.lang.Thread.run(Thread.java:745)

15. 2017-10-24 03:25:26,093 INFO org.apache.zookeeper.server.NIOServerCnxn: Closed socket connection for client /192.168.100.40:47304 which had sessionid 0x15ed091ee098981

16. 2017-10-24 03:25:26,093 WARN org.apache.zookeeper.server.NIOServerCnxn: caught end of stream exception

五.解决方法:
undefinedmaxClientCnxns调大到1000，重启zookeeper服务生效配置即可。

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