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https://issues.apache.org/jira/browse/DRILL-7076?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16809975#comment-16809975
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ASF GitHub Bot commented on DRILL-7076:
---------------------------------------
amansinha100 commented on issue #1722: DRILL-7076: Fix NPE in
StatsMaterializationVisitor
URL: https://github.com/apache/drill/pull/1722#issuecomment-479946019
@gparai can you look into the Travis failures with this PR ?
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> NPE is logged when querying postgres tables
> -------------------------------------------
>
> Key: DRILL-7076
> URL: https://issues.apache.org/jira/browse/DRILL-7076
> Project: Apache Drill
> Issue Type: Bug
> Affects Versions: 1.16.0
> Reporter: Volodymyr Vysotskyi
> Assignee: Gautam Parai
> Priority: Blocker
> Fix For: 1.16.0
>
>
> NPE is seen in logs when querying Postgres table:
> {code:sql}
> select 1 from postgres.public.tdt
> {code}
> Stack trace from {{sqlline.log}}:
> {noformat}
> 2019-03-05 13:49:19,395 [23819dc0-abf8-24f3-ea81-6ced1b6e11af:foreman] WARN
> o.a.d.e.p.common.DrillStatsTable - Failed to materialize the stats.
> Continuing without stats.
> java.lang.NullPointerException: null
> at
> org.apache.drill.exec.planner.common.DrillStatsTable$StatsMaterializationVisitor.visit(DrillStatsTable.java:189)
> [drill-java-exec-1.16.0-SNAPSHOT.jar:1.16.0-SNAPSHOT]
> at org.apache.calcite.rel.SingleRel.childrenAccept(SingleRel.java:72)
> [calcite-core-1.18.0-drill-r0.jar:1.18.0-drill-r0]
> at org.apache.calcite.rel.RelVisitor.visit(RelVisitor.java:44)
> [calcite-core-1.18.0-drill-r0.jar:1.18.0-drill-r0]
> at
> org.apache.drill.exec.planner.common.DrillStatsTable$StatsMaterializationVisitor.visit(DrillStatsTable.java:202)
> [drill-java-exec-1.16.0-SNAPSHOT.jar:1.16.0-SNAPSHOT]
> at org.apache.calcite.rel.RelVisitor.go(RelVisitor.java:61)
> [calcite-core-1.18.0-drill-r0.jar:1.18.0-drill-r0]
> at
> org.apache.drill.exec.planner.common.DrillStatsTable$StatsMaterializationVisitor.materialize(DrillStatsTable.java:177)
> [drill-java-exec-1.16.0-SNAPSHOT.jar:1.16.0-SNAPSHOT]
> at
> org.apache.drill.exec.planner.sql.handlers.DefaultSqlHandler.convertToRawDrel(DefaultSqlHandler.java:235)
> [drill-java-exec-1.16.0-SNAPSHOT.jar:1.16.0-SNAPSHOT]
> at
> org.apache.drill.exec.planner.sql.handlers.DefaultSqlHandler.convertToDrel(DefaultSqlHandler.java:331)
> [drill-java-exec-1.16.0-SNAPSHOT.jar:1.16.0-SNAPSHOT]
> at
> org.apache.drill.exec.planner.sql.handlers.DefaultSqlHandler.getPlan(DefaultSqlHandler.java:178)
> [drill-java-exec-1.16.0-SNAPSHOT.jar:1.16.0-SNAPSHOT]
> at
> org.apache.drill.exec.planner.sql.DrillSqlWorker.getQueryPlan(DrillSqlWorker.java:204)
> [drill-java-exec-1.16.0-SNAPSHOT.jar:1.16.0-SNAPSHOT]
> at
> org.apache.drill.exec.planner.sql.DrillSqlWorker.convertPlan(DrillSqlWorker.java:114)
> [drill-java-exec-1.16.0-SNAPSHOT.jar:1.16.0-SNAPSHOT]
> at
> org.apache.drill.exec.planner.sql.DrillSqlWorker.getPlan(DrillSqlWorker.java:80)
> [drill-java-exec-1.16.0-SNAPSHOT.jar:1.16.0-SNAPSHOT]
> at org.apache.drill.exec.work.foreman.Foreman.runSQL(Foreman.java:584)
> [drill-java-exec-1.16.0-SNAPSHOT.jar:1.16.0-SNAPSHOT]
> at org.apache.drill.exec.work.foreman.Foreman.run(Foreman.java:272)
> [drill-java-exec-1.16.0-SNAPSHOT.jar:1.16.0-SNAPSHOT]
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
> [na:1.8.0_191]
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
> [na:1.8.0_191]
> at java.lang.Thread.run(Thread.java:748) [na:1.8.0_191]
> {noformat}
> But query runs and returns the correct result.
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