JAVA api 远程hbase出错 org.apache.hadoop.hbase.client.RetriesExhaustedException

矫情吗；* 2022-05-27 03:59 230阅读 0赞

1.  **`问题：`JAVA api 远程hbase出错**
    
    **org.apache.hadoop.hbase.client.RetriesExhaustedException: Failed after attempts=36, exceptions:**  
    **Tue Jul 19 16:36:05 CST 2016, null, java.net.SocketTimeoutException: callTimeout=60000,** **callDuration=79721: row ‘testtable,’ on table ‘hbase:meta’ at region=hbase:meta,1.1588230740,** **hostname=ubuntu,16020,1468916750524, seqNum=0**
2.  **`实验环境：`**  
    **windows10 idea下 Java API 远程hbase，其中hbase安装在虚拟环境下，采用NAT网络模式，hbase IP地址为192.168.137.25 。windows10 vmnet8 IP为192.168.137.1 双方都可以ping通，排除网络问题。**
3.  `解决思路：`  
    首先 定位出错原因 ：`Caused by: java.net.UnknownHostException: ubuntu`无法解析ubuntu主机名。  
    此处的 ubuntu 为hbase所在虚拟机的主机名。解析不到ubuntu主机对应的IP地址，  
    (1) 首先查看ubuntu主机下hosts信息  
    gedit /etc/hosts
    
    127.0.0.1localhost  
    `127.0.1.1 ubuntu`

The following lines are desirable for IPv6 capable hosts（此处为\#注释，因为编辑器原因，改为手动文字注释）  
::1 ip6-localhost ip6-loopback  
fe00::0 ip6-localnet  
ff00::0 ip6-mcastprefix  
ff02::1 ip6-allnodes  
ff02::2 ip6-allrouters

(2)    java 连接代码如下：
    
         config = HBaseConfiguration.create();
    	 config.set("hbase.zookeeper.quorum", "192.168.137.25");
    	 config.set("hbase.zookeeper.property.clientPort", "2181");  
    	 config.set("hbase.master", "192.168.137.25:9001"); 
    
    ```(3)  发现ubuntu对应的IP地址为127.0.1.1 ，添加192.168.137.25  ubuntu  并注释 127.0.1.1 ubuntu ```
    
    127.0.0.1localhost（此处为#注释，因为编辑器原因，改为手动文字注释）
    127.0.1.1  ubuntu（此处为#注释，因为编辑器原因，改为手动文字注释）
    
    192.168.13725  ubuntu
    
    ```(4)  其中在windows10   下修改 C:\Windows\System32\drivers\etc\hosts，添加```
    
    ```192.168.137.25 ubuntu ```(本文楼主就差在了这一步)
    
    **问题解决**
    
    原因：hbase会根据192.168.137.25 找到虚拟机主机，并且根据主机hosts文件解析IP127.0.0.1，这就造成了无法识别主机名。

1.  `详细错误：`

org.apache.hadoop.hbase.client.RetriesExhaustedException: Failed after attempts=36, exceptions:
    Tue Jul 19 16:36:05 CST 2016, null, java.net.SocketTimeoutException: callTimeout=60000, callDuration=79721: row 'testtable,,' on table 'hbase:meta' at region=hbase:meta,,1.1588230740, hostname=ubuntu,16020,1468916750524, seqNum=0
    at org.apache.hadoop.hbase.client.RpcRetryingCallerWithReadReplicas.throwEnrichedException(RpcRetryingCallerWithReadReplicas.java:276)
    at org.apache.hadoop.hbase.client.ScannerCallableWithReplicas.call(ScannerCallableWithReplicas.java:207)
    at org.apache.hadoop.hbase.client.ScannerCallableWithReplicas.call(ScannerCallableWithReplicas.java:60)
    at org.apache.hadoop.hbase.client.RpcRetryingCaller.callWithoutRetries(RpcRetryingCaller.java:210)
    at org.apache.hadoop.hbase.client.ClientScanner.call(ClientScanner.java:326)
    at org.apache.hadoop.hbase.client.ClientScanner.nextScanner(ClientScanner.java:301)
    at org.apache.hadoop.hbase.client.ClientScanner.initializeScannerInConstruction(ClientScanner.java:166)
    at org.apache.hadoop.hbase.client.ClientScanner.<init>(ClientScanner.java:161)
    at org.apache.hadoop.hbase.client.HTable.getScanner(HTable.java:797)
    at org.apache.hadoop.hbase.MetaTableAccessor.fullScan(MetaTableAccessor.java:602)
    at org.apache.hadoop.hbase.MetaTableAccessor.tableExists(MetaTableAccessor.java:366)
    at org.apache.hadoop.hbase.client.HBaseAdmin.tableExists(HBaseAdmin.java:406)
    at upc.hbase.utils.HbaseTable.createTable(HbaseTable.java:46)
    at upc.hbase.test.HbaseTestDemo.main(HbaseTestDemo.java:20)
    Caused by: java.net.SocketTimeoutException: callTimeout=60000, callDuration=79721: row 'testtable,,' on table 'hbase:meta' at region=hbase:meta,,1.1588230740, hostname=ubuntu,16020,1468916750524, seqNum=0
    at org.apache.hadoop.hbase.client.RpcRetryingCaller.callWithRetries(RpcRetryingCaller.java:169)
    at org.apache.hadoop.hbase.client.ResultBoundedCompletionService$QueueingFuture.run(ResultBoundedCompletionService.java:65)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)
    ```Caused by: java.net.UnknownHostException: ubuntu```
    at org.apache.hadoop.hbase.ipc.AbstractRpcClient$BlockingRpcChannelImplementation.<init>(AbstractRpcClient.java:315)
    at org.apache.hadoop.hbase.ipc.AbstractRpcClient.createBlockingRpcChannel(AbstractRpcClient.java:267)
    at org.apache.hadoop.hbase.client.ConnectionManager$HConnectionImplementation.getClient(ConnectionManager.java:1639)
    at org.apache.hadoop.hbase.client.ScannerCallable.prepare(ScannerCallable.java:162)
    at org.apache.hadoop.hbase.client.ScannerCallableWithReplicas$RetryingRPC.prepare(ScannerCallableWithReplicas.java:372)
    at org.apache.hadoop.hbase.client.RpcRetryingCaller.callWithRetries(RpcRetryingCaller.java:134)
    ... 4 more

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