[jira] [Commented] (HIVE-26538) MetastoreDefaultTransformer should revise the location when it's empty

["Zhihua Deng (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HIVE-26538?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17606521#comment-17606521 ] 

Zhihua Deng commented on HIVE-26538:
------------------------------------

When running hms benchmarks, there is an exception:
{code:java}
%d [%thread] %-5level %logger - %msg%n java.lang.RuntimeException: MetaException(message:java.lang.IllegalArgumentException: Can not create a Path from an empty string)
    at org.apache.hadoop.hive.metastore.tools.Util.throwingSupplierWrapper(Util.java:91) ~[hmsbench-jar-with-dependencies.jar:?]
    at org.apache.hadoop.hive.metastore.tools.HMSBenchmarks.lambda$benchmarkRenameTable$57(HMSBenchmarks.java:366) ~[hmsbench-jar-with-dependencies.jar:?]
    at org.apache.hadoop.hive.metastore.tools.MicroBenchmark.measure(MicroBenchmark.java:92) ~[hmsbench-jar-with-dependencies.jar:?]
    at org.apache.hadoop.hive.metastore.tools.MicroBenchmark.measure(MicroBenchmark.java:121) ~[hmsbench-jar-with-dependencies.jar:?]
    at org.apache.hadoop.hive.metastore.tools.HMSBenchmarks.benchmarkRenameTable(HMSBenchmarks.java:363) ~[hmsbench-jar-with-dependencies.jar:?]
    at org.apache.hadoop.hive.metastore.tools.BenchmarkTool.lambda$runNonAcidBenchmarks$17(BenchmarkTool.java:266) ~[hmsbench-jar-with-dependencies.jar:?]
    at org.apache.hadoop.hive.metastore.tools.BenchmarkSuite.lambda$runAll$0(BenchmarkSuite.java:126) ~[hmsbench-jar-with-dependencies.jar:?]
    at java.util.ArrayList.forEach(ArrayList.java:1259) ~[?:1.8.0_292]
    at org.apache.hadoop.hive.metastore.tools.BenchmarkSuite.runAll(BenchmarkSuite.java:124) ~[hmsbench-jar-with-dependencies.jar:?]
    at org.apache.hadoop.hive.metastore.tools.BenchmarkSuite.runMatching(BenchmarkSuite.java:158) ~[hmsbench-jar-with-dependencies.jar:?]
    at org.apache.hadoop.hive.metastore.tools.BenchmarkTool.runNonAcidBenchmarks(BenchmarkTool.java:319) [hmsbench-jar-with-dependencies.jar:?]
    at org.apache.hadoop.hive.metastore.tools.BenchmarkTool.run(BenchmarkTool.java:189) [hmsbench-jar-with-dependencies.jar:?]
    at picocli.CommandLine.execute(CommandLine.java:833) [hmsbench-jar-with-dependencies.jar:?]
    at picocli.CommandLine.access$700(CommandLine.java:111) [hmsbench-jar-with-dependencies.jar:?]
    at picocli.CommandLine$RunLast.handle(CommandLine.java:1010) [hmsbench-jar-with-dependencies.jar:?]
    at picocli.CommandLine$RunLast.handle(CommandLine.java:978) [hmsbench-jar-with-dependencies.jar:?]
    at picocli.CommandLine$AbstractParseResultHandler.handleParseResult(CommandLine.java:886) [hmsbench-jar-with-dependencies.jar:?]
    at picocli.CommandLine.parseWithHandlers(CommandLine.java:1169) [hmsbench-jar-with-dependencies.jar:?]
    at picocli.CommandLine.run(CommandLine.java:1506) [hmsbench-jar-with-dependencies.jar:?]
    at picocli.CommandLine.run(CommandLine.java:1440) [hmsbench-jar-with-dependencies.jar:?]
    at org.apache.hadoop.hive.metastore.tools.BenchmarkTool.main(BenchmarkTool.java:149) [hmsbench-jar-with-dependencies.jar:?]
{code}

> MetastoreDefaultTransformer should revise the location when it's empty
> ----------------------------------------------------------------------
>
>                 Key: HIVE-26538
>                 URL: https://issues.apache.org/jira/browse/HIVE-26538
>             Project: Hive
>          Issue Type: Improvement
>          Components: Standalone Metastore
>            Reporter: Zhihua Deng
>            Assignee: Zhihua Deng
>            Priority: Major
>              Labels: pull-request-available
>          Time Spent: 0.5h
>  Remaining Estimate: 0h
>
> The table's location is treated as null when it's empty, this takes place somewhere such as:
> [https://github.com/apache/hive/blob/82f319773cb2361a98963e861fb903ab8eecd9c4/standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/HMSHandler.java#L2367]
> [https://github.com/apache/hive/blob/master/standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/MetastoreDefaultTransformer.java#L729]  
> MetastoreDefaultTransformer should revise the empty location when altering/creating tables.



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