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Review request for kylin, Dayue Gao, hongbin ma, and Wang Xiaoyu. Bugs: KYLIN-2557 https://issues.apache.org/jira/browse/KYLIN-2557 Repository: kylin Description ------- Muliple instances were started at the same time after we installed the kylin. A conflict will occurs because these instances cteate kylin_metadata_acl table at the same time. The result is that the kylin start failed. The error log is as following: Caused by: org.apache.hadoop.hbase.TableExistsException: kylin_metadata_acl at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.lang.reflect.Constructor.newInstance(Constructor.java:526) at org.apache.hadoop.ipc.RemoteException.instantiateException(RemoteException.java:106) at org.apache.hadoop.ipc.RemoteException.unwrapRemoteException(RemoteException.java:95) at org.apache.hadoop.hbase.util.ForeignExceptionUtil.toIOException(ForeignExceptionUtil.java:45) at org.apache.hadoop.hbase.client.HBaseAdmin$ProcedureFuture.convertResult(HBaseAdmin.java:4448) at org.apache.hadoop.hbase.client.HBaseAdmin$ProcedureFuture.waitProcedureResult(HBaseAdmin.java:4406) at org.apache.hadoop.hbase.client.HBaseAdmin$ProcedureFuture.get(HBaseAdmin.java:4339) at org.apache.hadoop.hbase.client.HBaseAdmin.createTable(HBaseAdmin.java:674) at org.apache.hadoop.hbase.client.HBaseAdmin.createTable(HBaseAdmin.java:604) at org.apache.kylin.storage.hbase.HBaseConnection.createHTableIfNeeded(HBaseConnection.java:307) at org.apache.kylin.storage.hbase.HBaseConnection.createHTableIfNeeded(HBaseConnection.java:262) at org.apache.kylin.rest.security.RealAclHBaseStorage.prepareHBaseTable(RealAclHBaseStorage.java:50) at org.apache.kylin.rest.security.MockAclHBaseStorage.prepareHBaseTable(MockAclHBaseStorage.java:53) at org.apache.kylin.rest.service.AclService.init(AclService.java:121) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleElement.invoke(InitDestroyAnnotationBeanPostProcessor.java:344) at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMetadata.invokeInitMethods(InitDestroyAnnotationBeanPostProcessor.java:295) at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeInitialization(InitDestroyAnnotationBeanPostProcessor.java:130) ... 125 more Diffs ----- storage-hbase/src/main/java/org/apache/kylin/storage/hbase/HBaseConnection.java 7e2cefc69 storage-hbase/src/main/java/org/apache/kylin/storage/hbase/util/ZookeeperCreateHTableLock.java PRE-CREATION Diff: https://reviews.apache.org/r/58554/diff/1/ Testing ------- Thanks, pengjianhua