mohitbadve opened a new pull request, #5553:
URL: https://github.com/apache/hive/pull/5553
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### What changes were proposed in this pull request?
This PR fixes the error resulting from the flaky tests:
org.apache.hadoop.hive.metastore.TestPartitionManagement.testPartitionDiscoveryTransactionalTable
The mentioned test is non-deterministic as it throws error unexpectedly.
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### Why are the changes needed?
The test fails because the `tearDown()` method attempts to delete a record
(DBS entry) that is referenced by another table (TBLS), which caused a
violation of foreign key constraint ‘TBLS_FK1’.
[INFO] T E S T S
[INFO] -------------------------------------------------------
[INFO] Running org.apache.hadoop.hive.metastore.TestPartitionManagement
[ERROR] Tests run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed:
13.15 s <<< FAILURE! -- in
org.apache.hadoop.hive.metastore.TestPartitionManagement
[ERROR]
org.apache.hadoop.hive.metastore.TestPartitionManagement.testPartitionDiscoveryTransactionalTable
-- Time elapsed: 13.15 s <<< ERROR!
MetaException(message:JDODataStoreException: Exception thrown flushing
changes to datastore
Root cause: ERROR 23503: DELETE on table 'DBS' caused a violation of foreign
key constraint 'TBLS_FK1' for key (2). The statement has been rolled back.)
at
org.apache.hadoop.hive.metastore.api.ThriftHiveMetastore$drop_database_req_result$drop_database_req_resultStandardScheme.read(ThriftHiveMetastore.java:59587)
at
org.apache.hadoop.hive.metastore.api.ThriftHiveMetastore$drop_database_req_result$drop_database_req_resultStandardScheme.read(ThriftHiveMetastore.java:59555)
at
org.apache.hadoop.hive.metastore.api.ThriftHiveMetastore$drop_database_req_result.read(ThriftHiveMetastore.java:59489)
at org.apache.thrift.TServiceClient.receiveBase(TServiceClient.java:88)
at
org.apache.hadoop.hive.metastore.api.ThriftHiveMetastore$Client.recv_drop_database_req(ThriftHiveMetastore.java:1545)
at
org.apache.hadoop.hive.metastore.api.ThriftHiveMetastore$Client.drop_database_req(ThriftHiveMetastore.java:1532)
at
org.apache.hadoop.hive.metastore.HiveMetaStoreClient.dropDatabaseCascadePerDb(HiveMetaStoreClient.java:1870)
at
org.apache.hadoop.hive.metastore.HiveMetaStoreClient.dropDatabase(HiveMetaStoreClient.java:1794)
at
org.apache.hadoop.hive.metastore.IMetaStoreClient.dropDatabase(IMetaStoreClient.java:1870)
at
org.apache.hadoop.hive.metastore.TestPartitionManagement.tearDown(TestPartitionManagement.java:101)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)....
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### Reproduce the test failure
Run the tests with [NonDex
](https://github.com/TestingResearchIllinois/NonDex) maven plugin which is used
for detecting and debugging wrong assumptions on under-determined Java APIs.
The command to reproduce the flaky test failures is:
```
mvn -pl standalone-metastore/metastore-server
edu.illinois:nondex-maven-plugin:2.1.7:nondex
-Dtest=org.apache.hadoop.hive.metastore.TestPartitionManagement#testPartitionDiscoveryTransactionalTable
-DnondexRuns=10
```
### Does this PR introduce _any_ user-facing change?
No, it just fixes the test.
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### Is the change a dependency upgrade?
No
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### Fix
Drop all tables first before dropping the databases.
### How was this patch tested?
After adding the code to delete the tables as well, again NonDex was run to
ensure the test passes all the times.
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