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https://issues.apache.org/jira/browse/IMPALA-11768?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17720682#comment-17720682
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Sai Hemanth Gantasala commented on IMPALA-11768:
------------------------------------------------
[~stigahuang] - I'm working on the
[Hive|https://issues.apache.org/jira/browse/HIVE-27319] side fix for this
issue. I think we need an IMPALA side fix since the HMS client would now throw
an InvalidObjectException. What do you think?
> EventProcessor should ignore failures on non-existing dbs/tables
> ----------------------------------------------------------------
>
> Key: IMPALA-11768
> URL: https://issues.apache.org/jira/browse/IMPALA-11768
> Project: IMPALA
> Issue Type: Bug
> Components: Catalog
> Reporter: Quanlong Huang
> Assignee: Sai Hemanth Gantasala
> Priority: Critical
> Attachments:
> catalogd.84223c9b5251.invalid-user.log.INFO.20221129-132600.1.gz,
> hive-metastore.log.gz, hive-server2.log.gz,
> impalad.b99660bbd523.invalid-user.log.INFO.20221129-132601.1.bz2
>
>
> We recently saw test failures in
> [https://jenkins.impala.io/job/ubuntu-16.04-dockerised-tests/6697/]
> {noformat}
> metadata.test_event_processing.TestEventProcessing.test_event_based_replication
> metadata.test_event_processing.TestEventProcessing.test_empty_partition_events
> metadata.test_event_processing.TestEventProcessing.test_transactional_insert_events
> metadata.test_event_processing.TestEventProcessing.test_insert_events
> metadata.test_event_processing.TestEventProcessing.test_empty_partition_events_transactional
> {noformat}
> The errors are similar:
> {code:python}
> metadata/test_event_processing.py:179: in test_event_based_replication
> self.__run_event_based_replication_tests()
> metadata/test_event_processing.py:194: in __run_event_based_replication_tests
> EventProcessorUtils.wait_for_event_processing(self)
> util/event_processor_utils.py:65: in wait_for_event_processing
> within {1} seconds".format(current_event_id, timeout))
> E Exception: Event processor did not sync till last known event id 21676
> within 10 seconds
> {code}
> Stderr:
> {noformat}
> SET
> client_identifier=metadata/test_event_processing.py::TestEventProcessing::()::test_event_based_replication;
> -- connecting to: localhost:21000
> -- connecting to localhost:21050 with impyla
> -- 2022-11-29 14:10:14,332 INFO MainThread: Closing active operation
> -- connecting to localhost:28000 with impyla
> -- 2022-11-29 14:10:14,346 INFO MainThread: Closing active operation
> -- 2022-11-29 14:10:19,364 INFO MainThread: Waiting until events
> processor syncs to event id:21676
> {noformat}
> Looking into the catalogd logs, the event-processor is already in the
> NEEDS_INVALIDATE state so it's paused:
> {noformat}
> W1129 14:10:09.401335 92 MetastoreEventsProcessor.java:844] Event
> processing is skipped since status is NEEDS_INVALIDATE. Last synced event id
> is 21538
> {noformat}
> The last event it processed is an INSERT event. The metadata reloading failed:
> {noformat}
> I1129 14:10:07.365427 92 MetastoreEventsProcessor.java:805] Received 36
> events. Start event id : 21538
> I1129 14:10:07.367424 92 MetastoreEvents.java:631] EventId: 21552
> EventType: DROP_DATABASE Creating event 21552 of type DROP_DATABASE on
> database test_views_ddl_b1c33615
> I1129 14:10:07.371448 92 MetastoreEvents.java:631] EventId: 21573
> EventType: DROP_DATABASE Creating event 21573 of type DROP_DATABASE on
> database test_compute_stats_9c95c5d8
> I1129 14:10:07.371696 92 MetastoreEvents.java:281] Total number of events
> received: 36 Total number of events filtered out: 0
> I1129 14:10:07.371767 92 MetastoreEvents.java:285] Incremented skipped
> metric to 2631
> I1129 14:10:07.371951 92 HdfsTable.java:2744] Reloading partition
> metadata: test_alter_table_hdfs_caching_95073aa2.i1670e_alter x=1 (INSERT
> event)
> W1129 14:10:07.381459 92 RetryingMetaStoreClient.java:269] MetaStoreClient
> lost connection. Attempting to reconnect (1 of 1) after 1s.
> getPartitionsByNames
> Java exception follows:
> org.apache.thrift.TApplicationException: Internal error processing
> get_partitions_by_names_req
> ...
> {noformat}
> It then fails in the retry, and needs manual invalidate metadata:
> {noformat}
> I1129 14:10:08.381718 92 RetryingMetaStoreClient.java:185]
> RetryingMetaStoreClient trying reconnect as ubuntu (auth:SIMPLE)
> ...
> I1129 14:10:08.395550 92 HiveMetaStoreClient.java:821] Connected to
> metastore.
> I1129 14:10:08.400802 92 MetastoreEventsProcessor.java:1026] Time elapsed
> in processing event batch: 1s035ms
> E1129 14:10:08.401016 92 MetastoreEventsProcessor.java:859] Event
> processing needs a invalidate command to resolve the state
> Java exception follows:
> org.apache.impala.catalog.events.MetastoreNotificationNeedsInvalidateException:
> EventId: 21539 EventType: INSERT Refresh partition on table {} partition {}
> failed. Event processing cannot continue. Issue an invalidate metadata
> command to reset the event processor state.
> at
> org.apache.impala.catalog.events.MetastoreEvents$InsertEvent.processPartitionInserts(MetastoreEvents.java:1298)
> at
> org.apache.impala.catalog.events.MetastoreEvents$InsertEvent.process(MetastoreEvents.java:1277)
> at
> org.apache.impala.catalog.events.MetastoreEvents$MetastoreEvent.processIfEnabled(MetastoreEvents.java:514)
> at
> org.apache.impala.catalog.events.MetastoreEventsProcessor.processEvents(MetastoreEventsProcessor.java:1013)
> at
> org.apache.impala.catalog.events.MetastoreEventsProcessor.processEvents(MetastoreEventsProcessor.java:851)
> at
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
> at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
> at
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
> at
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
> at java.lang.Thread.run(Thread.java:748)
> Caused by: org.apache.impala.catalog.CatalogException: Unexpected error while
> retrieving partitions for table
> test_alter_table_hdfs_caching_95073aa2.i1670e_alter
> at
> org.apache.impala.catalog.HdfsTable.reloadPartitionsFromNames(HdfsTable.java:2768)
> at
> org.apache.impala.service.CatalogOpExecutor.reloadPartitionsIfExist(CatalogOpExecutor.java:4501)
> at
> org.apache.impala.catalog.events.MetastoreEvents$MetastoreTableEvent.reloadPartitions(MetastoreEvents.java:879)
> at
> org.apache.impala.catalog.events.MetastoreEvents$InsertEvent.processPartitionInserts(MetastoreEvents.java:1295)
> ... 11 more
> Caused by: org.apache.thrift.TApplicationException: Internal error processing
> get_partitions_by_names_req
> at
> org.apache.thrift.TServiceClient.receiveBase(TServiceClient.java:79)
> at
> org.apache.hadoop.hive.metastore.api.ThriftHiveMetastore$Client.recv_get_partitions_by_names_req(ThriftHiveMetastore.java:4162)
> at
> org.apache.hadoop.hive.metastore.api.ThriftHiveMetastore$Client.get_partitions_by_names_req(ThriftHiveMetastore.java:4149)
> at
> org.apache.hadoop.hive.metastore.HiveMetaStoreClient.getPartitionsByNamesInternal(HiveMetaStoreClient.java:2500)
> at
> org.apache.hadoop.hive.metastore.HiveMetaStoreClient.getPartitionsByNames(HiveMetaStoreClient.java:2491)
> at
> org.apache.hadoop.hive.metastore.HiveMetaStoreClient.getPartitionsByNames(HiveMetaStoreClient.java:2468)
> at
> org.apache.hadoop.hive.metastore.HiveMetaStoreClient.getPartitionsByNames(HiveMetaStoreClient.java:2445)
> at
> org.apache.hadoop.hive.metastore.HiveMetaStoreClient.getPartitionsByNames(HiveMetaStoreClient.java:2409)
> at sun.reflect.GeneratedMethodAccessor13.invoke(Unknown Source)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:498)
> at
> org.apache.hadoop.hive.metastore.RetryingMetaStoreClient.invoke(RetryingMetaStoreClient.java:212)
> at com.sun.proxy.$Proxy11.getPartitionsByNames(Unknown Source)
> at
> org.apache.impala.catalog.HdfsTable.reloadPartitionsFromNames(HdfsTable.java:2749)
> ... 14 more
> {noformat}
> In HMS logs, the internal error is that the table is dropped:
> {noformat}
> 2022-11-29T14:10:08,398 ERROR [TThreadPoolServer WorkerProcess-28]
> metastore.RetryingHMSHandler:
> InvalidObjectException(message:hive.test_alter_table_hdfs_caching_95073aa2.i1670e_alter
> table not found)
> ...
> 2022-11-29T14:10:08,398 ERROR [TThreadPoolServer WorkerProcess-28]
> thrift.ProcessFunction: Internal error processing get_partitions_by_names_req
> org.apache.hadoop.hive.metastore.api.InvalidObjectException:
> hive.test_alter_table_hdfs_caching_95073aa2.i1670e_alter table not found
> ...
> {noformat}
> It's dropped by a concurrent DROP DATABASE CASCADE command. In the catalogd
> logs:
> {noformat}
> I1129 14:10:07.005285 104 JniCatalog.java:257] execDdl request:
> DROP_DATABASE test_alter_table_hdfs_caching_95073aa2 issued by ubuntu
> ...
> I1129 14:10:07.387348 104 CatalogServiceCatalog.java:3290] Should wait for
> next update for DATABASE:test_alter_table_hdfs_caching_95073aa2: older
> version 4077 is sent. Expects a version >= 4727.
> {noformat}
> When failed to process the event, the event-processor should doulbe check
> whether the target (db/table) still exists in HMS in case of such concurrent
> drop operations. If the target no longer exists, just skip the failure and
> invalidate the corresponding catalog object.
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