hbase与java客户端的连接

Question

I have a java program ( eclipse , Maven , windows7) to fill Hbase which exist on a VirtualBox from a service, the program works fine when I run it from eclipse .

But when i created an executable jar using the assembly plugin in Maven and run it from the cmd or from cygwin I get this error

> [2016-05-03 14:46:44,663][DEBUG] Reading reply sessionid:0x154769ed563000a, packet:: clientPath:null serverPath:null finished:false header:: 300,4  replyHeader:: 300,3632,-101  request:: '/hbase-unsecure/meta-region-server,F  response:: [2016-05-03 14:46:44,663][DEBUG] hconnection-0x6b63f5ff-0x154769ed563000a, quorum=sandbox:2181, baseZNode=/hbase-unsecure Unable to get data of znode /hbase-unsecure/meta-region-server because node does not exist (not an error) [2016-05-03 14:46:44,663][DEBUG] Looked up meta region location, connection=org.apache.hadoop.hbase.client.ZooKeeperRegistry@695e5335; servers = null [2016-05-03 14:46:44,689][DEBUG] Closing scanner id=-1

>org.apache.hadoop.hbase.client.RetriesExhaustedException: Can't get the locations
        at org.apache.hadoop.hbase.client.RpcRetryingCallerWithReadReplicas.getRegionLocations(RpcRetryingCallerWithReadReplicas.java:312)
        at org.apache.hadoop.hbase.client.ScannerCallableWithReplicas.call(ScannerCallableWithReplicas.java:153)
        at org.apache.hadoop.hbase.client.ScannerCallableWithReplicas.call(ScannerCallableWithReplicas.java:61)
        at org.apache.hadoop.hbase.client.RpcRetryingCaller.callWithoutRetries(RpcRetryingCaller.java:200)
        at org.apache.hadoop.hbase.client.ClientScanner.call(ClientScanner.java:320)
        at org.apache.hadoop.hbase.client.ClientScanner.nextScanner(ClientScanner.java:295)
        at org.apache.hadoop.hbase.client.ClientScanner.initializeScannerInConstruction(ClientScanner.java:160)
        at org.apache.hadoop.hbase.client.ClientScanner.<init>(ClientScanner.java:155)
        at org.apache.hadoop.hbase.client.HTable.getScanner(HTable.java:811)
        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:303)
        at org.apache.hadoop.hbase.client.HBaseAdmin.tableExists(HBaseAdmin.java:313)

Could any of you help me with this?

Answer 1

Some more information like the following may be helpful. Run these commands in the virtualbox where you have the "hbase" command

hbase zkCli -server sandbox:2181

Once you connect, you can run, in the zkcli prompt:

ls /

Please paste the output of the above command. The baseZnode of "/hbase-unsecure " does not seem to exist. In general the base znode is "/hbase".

Kindly cross check the classpath of your running program by the java code, as suggested by @RamPrasadG

System.out.println(System.getProperty("java.classpath"))