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https://issues.apache.org/jira/browse/HIVE-28906?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17955382#comment-17955382
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Denys Kuzmenko edited comment on HIVE-28906 at 5/31/25 8:57 AM:
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I didn't know that there was an open ticket, and fixed it within HIVE-28964
was (Author: dkuzmenko):
should be fixed by HIVE-28964
> NPE in DbTxnManager when rebuilding an Iceberg materialized view
> ----------------------------------------------------------------
>
> Key: HIVE-28906
> URL: https://issues.apache.org/jira/browse/HIVE-28906
> Project: Hive
> Issue Type: Bug
> Reporter: Stamatis Zampetakis
> Priority: Major
>
> Rebuilding an Iceberg materialized view triggers a NullPointerException in
> DbTxnManager when the transaction manager is not fully initialized.
> {code:sql}
> set hive.support.concurrency=true;
> set hive.txn.manager=org.apache.hadoop.hive.ql.lockmgr.DbTxnManager;
> create table t1(a int) stored by iceberg stored as orc;
> create materialized view mat1 stored by iceberg stored as orc as select *
> from t1;
> insert into t1 values (1);
> alter materialized view mat1 rebuild;
> {code}
> The above sequence does not call DbTxnManager.init and thus leads to the
> following NPE when we try to obtain a lock.
> {noformat}
> org.apache.hadoop.hive.ql.parse.SemanticException:
> java.lang.NullPointerException
> at
> org.apache.hadoop.hive.ql.ddl.view.materialized.alter.rebuild.AlterMaterializedViewRebuildAnalyzer.getRewrittenAST(AlterMaterializedViewRebuildAnalyzer.java:227)
> at
> org.apache.hadoop.hive.ql.ddl.view.materialized.alter.rebuild.AlterMaterializedViewRebuildAnalyzer.analyzeInternal(AlterMaterializedViewRebuildAnalyzer.java:175)
> at
> org.apache.hadoop.hive.ql.parse.BaseSemanticAnalyzer.analyze(BaseSemanticAnalyzer.java:336)
> at org.apache.hadoop.hive.ql.Compiler.analyze(Compiler.java:224)
> at org.apache.hadoop.hive.ql.Compiler.compile(Compiler.java:109)
> at org.apache.hadoop.hive.ql.Driver.compile(Driver.java:498)
> at org.apache.hadoop.hive.ql.Driver.compileInternal(Driver.java:450)
> at org.apache.hadoop.hive.ql.Driver.compileAndRespond(Driver.java:414)
> at org.apache.hadoop.hive.ql.Driver.compileAndRespond(Driver.java:408)
> at
> org.apache.hadoop.hive.ql.reexec.ReExecDriver.compileAndRespond(ReExecDriver.java:126)
> at
> org.apache.hadoop.hive.ql.reexec.ReExecDriver.run(ReExecDriver.java:234)
> at
> org.apache.hadoop.hive.cli.CliDriver.processLocalCmd(CliDriver.java:257)
> at org.apache.hadoop.hive.cli.CliDriver.processCmd1(CliDriver.java:201)
> at org.apache.hadoop.hive.cli.CliDriver.processCmd(CliDriver.java:127)
> at org.apache.hadoop.hive.cli.CliDriver.processLine(CliDriver.java:425)
> at org.apache.hadoop.hive.cli.CliDriver.processLine(CliDriver.java:356)
> at
> org.apache.hadoop.hive.ql.QTestUtil.executeClientInternal(QTestUtil.java:746)
> at org.apache.hadoop.hive.ql.QTestUtil.executeClient(QTestUtil.java:716)
> at
> org.apache.hadoop.hive.cli.control.CoreCliDriver.runTest(CoreCliDriver.java:116)
> at
> org.apache.hadoop.hive.cli.control.CliAdapter.runTest(CliAdapter.java:157)
> at
> org.apache.hadoop.hive.cli.TestIcebergCliDriver.testCliDriver(TestIcebergCliDriver.java:61)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:498)
> at
> org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:59)
> at
> org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
> at
> org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56)
> at
> org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
> at
> org.apache.hadoop.hive.cli.control.CliAdapter$2$1.evaluate(CliAdapter.java:135)
> at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
> at
> org.junit.runners.BlockJUnit4ClassRunner$1.evaluate(BlockJUnit4ClassRunner.java:100)
> at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:366)
> at
> org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:103)
> at
> org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:63)
> at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)
> at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79)
> at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329)
> at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66)
> at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293)
> at org.junit.runners.ParentRunner.run(ParentRunner.java:413)
> at org.junit.runners.Suite.runChild(Suite.java:128)
> at org.junit.runners.Suite.runChild(Suite.java:27)
> at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)
> at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79)
> at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329)
> at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66)
> at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293)
> at
> org.apache.hadoop.hive.cli.control.CliAdapter$1$1.evaluate(CliAdapter.java:95)
> at org.junit.rules.RunRules.evaluate(RunRules.java:20)
> at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
> at org.junit.runners.ParentRunner.run(ParentRunner.java:413)
> at
> org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:316)
> at
> org.apache.maven.surefire.junit4.JUnit4Provider.executeWithRerun(JUnit4Provider.java:240)
> at
> org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:214)
> at
> org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:155)
> at
> org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:385)
> at
> org.apache.maven.surefire.booter.ForkedBooter.execute(ForkedBooter.java:162)
> at
> org.apache.maven.surefire.booter.ForkedBooter.run(ForkedBooter.java:507)
> at
> org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:495)
> Caused by: java.lang.NullPointerException
> at
> org.apache.hadoop.hive.ql.lockmgr.DbTxnManager.startHeartbeat(DbTxnManager.java:727)
> at
> org.apache.hadoop.hive.ql.lockmgr.DbTxnManager.acquireMaterializationRebuildLock(DbTxnManager.java:1033)
> at
> org.apache.hadoop.hive.ql.ddl.view.materialized.alter.rebuild.AlterMaterializedViewRebuildAnalyzer.getRewrittenAST(AlterMaterializedViewRebuildAnalyzer.java:216)
> ... 59 more
> {noformat}
> Note that if we run other queries before the REBUILD statement, for instance
> create an transactional table, the DbTxnManager.init may be called and thus
> circumvent the failure.
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