I write job mapreduce.The input is a table in hbase.
When job run, had error :
org.apache.hadoop.hbase.client.ScannerTimeoutException: 88557ms passed since the last invocation, timeout is currently set to 60000 at org.apache.hadoop.hbase.client.HTable$ClientScanner.next(HTable.java:1196) at org.apache.hadoop.hbase.mapreduce.TableRecordReaderImpl.nextKeyValue(TableRecordReaderImpl.java:133) at org.apache.hadoop.hbase.mapreduce.TableRecordReader.nextKeyValue(TableRecordReader.java:142) at org.apache.hadoop.mapred.MapTask$NewTrackingRecordReader.nextKeyValue(MapTask.java:532) at org.apache.hadoop.mapreduce.MapContext.nextKeyValue(MapContext.java:67) at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:143) at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:764) at org.apache.hadoop.mapred.MapTask.run(MapTask.java:370) at org.apache.hadoop.mapred.Child$4.run(Child.java:255) at java.security.AccessController.doPrivileged(Native Method) at javax.security.auth.Subject.doAs(Subject.java:396) at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1083) at org.apache.hadoop.mapred.Child.main(Child.java:249) Caused by: org.apache.hadoop.hbase.UnknownScannerException: org.apache.hadoop.hbase.UnknownScannerException: Name: 1502530095384129314 at org.apache.hadoop.hbase.regionserver.HRegionServer.next(HRegionServer.java:1837) at sun.reflect.GeneratedMethodAccessor19.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.apache.hadoop.hbase.ipc.HBaseRPC$Server.call(HBaseRPC.java:570) at org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:1039) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27) at java.lang.reflect.Constructor.newInstance(Constructor.java:513) at org.apache.hadoop.hbase.RemoteExceptionHandler.decodeRemoteException(RemoteExceptionHandler.java:96) at org.apache.hadoop.hbase.client.ScannerCallable.call(ScannerCallable.java:83) at org.apache.hadoop.hbase.client.ScannerCallable.call(ScannerCallable.java:38) at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.getRegionServerWithRetries(HConnectionManager.java:1226) at org.apache.hadoop.hbase.client.HTable$ClientScanner.next(HTable.java:1187) ... 12 more
Can you help me fix it.
Answer
Scanner Time-Out Exception has been occurred. To avoid time-out Exception Increase the time-out by setting the property in hbase-site.xml which will be available in hbase-> conf
<property>
<name>hbase.client.scanner.timeout.period</name>
<value>900000</value> <!-- 900 000, 15 minutes -->
</property>
<property>
<name>hbase.rpc.timeout</name>
<value>900000</value> <!-- 15 minutes -->
</property>