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https://issues.apache.org/jira/browse/DRILL-4863?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15437352#comment-15437352
]
Khurram Faraaz commented on DRILL-4863:
---------------------------------------
this maybe specific to querying from MySQL datasource.
> JDBC Storage Plugin SYSTEM ERROR: NullPointerException Error
> ------------------------------------------------------------
>
> Key: DRILL-4863
> URL: https://issues.apache.org/jira/browse/DRILL-4863
> Project: Apache Drill
> Issue Type: Bug
> Components: Storage - JDBC
> Affects Versions: 1.7.0
> Environment: * Ubuntu 14.04.1 LTS (GNU/Linux 3.13.0-40-generic x86_64)
> * Java(TM) SE Runtime Environment (build 1.7.0_80-b15)
> * Data Source: mysql Ver 14.14 Distrib 5.7.10
> Reporter: Christopher Altman
>
> When running the query:
> {code}
> SELECT * FROM (SELECT count(*) from mysql.test.acme_sales ) T LIMIT 0
> {code}
> I receive the error:
> {code}
> SYSTEM ERROR: NullPointerException
> {code}
> Here are the logs
> {code}
> SYSTEM ERROR: NullPointerException
> (org.apache.drill.exec.work.foreman.ForemanException) Unexpected exception
> during fragment initialization: null
> org.apache.drill.exec.work.foreman.Foreman.run():271
> java.util.concurrent.ThreadPoolExecutor.runWorker():1145
> java.util.concurrent.ThreadPoolExecutor$Worker.run():615
> java.lang.Thread.run():745
> Caused By (java.lang.NullPointerException) null
>
> org.apache.drill.exec.planner.sql.handlers.FindLimit0Visitor$FindHardDistributionScans.visit():262
> org.apache.calcite.rel.core.TableScan.accept():166
> org.apache.calcite.rel.RelShuttleImpl.visitChild():53
> org.apache.calcite.rel.RelShuttleImpl.visitChildren():68
> org.apache.calcite.rel.RelShuttleImpl.visit():126
> org.apache.calcite.rel.AbstractRelNode.accept():256
> org.apache.calcite.rel.RelShuttleImpl.visitChild():53
> org.apache.calcite.rel.RelShuttleImpl.visitChildren():68
> org.apache.calcite.rel.RelShuttleImpl.visit():126
> org.apache.calcite.rel.AbstractRelNode.accept():256
> org.apache.calcite.rel.RelShuttleImpl.visitChild():53
> org.apache.calcite.rel.RelShuttleImpl.visitChildren():68
> org.apache.calcite.rel.RelShuttleImpl.visit():126
> org.apache.calcite.rel.AbstractRelNode.accept():256
> org.apache.calcite.rel.RelShuttleImpl.visitChild():53
> org.apache.calcite.rel.RelShuttleImpl.visitChildren():68
> org.apache.calcite.rel.RelShuttleImpl.visit():126
> org.apache.calcite.rel.AbstractRelNode.accept():256
>
> org.apache.drill.exec.planner.sql.handlers.FindLimit0Visitor.containsLimit0():129
>
> org.apache.drill.exec.planner.sql.handlers.DefaultSqlHandler.convertToDrel():259
>
> org.apache.drill.exec.planner.sql.handlers.DefaultSqlHandler.convertToDrel():286
> org.apache.drill.exec.planner.sql.handlers.DefaultSqlHandler.getPlan():168
> org.apache.drill.exec.planner.sql.DrillSqlWorker.getPlan():94
> org.apache.drill.exec.work.foreman.Foreman.runSQL():978
> org.apache.drill.exec.work.foreman.Foreman.run():257
> java.util.concurrent.ThreadPoolExecutor.runWorker():1145
> java.util.concurrent.ThreadPoolExecutor$Worker.run():615
> java.lang.Thread.run():745
>
> Error Id: c9a4bc51-a18c-408a-9958-23124b9aac47 on 10.0.1.241:31010]
> org.apache.drill.common.exceptions.UserException: SYSTEM ERROR:
> NullPointerException
> [Error Id: c9a4bc51-a18c-408a-9958-23124b9aac47 on 10.0.1.241:31010]
> at
> org.apache.drill.common.exceptions.UserException$Builder.build(UserException.java:543)
> ~[drill-common-1.7.0.jar:1.7.0]
> at
> org.apache.drill.exec.work.foreman.Foreman$ForemanResult.close(Foreman.java:791)
> [drill-java-exec-1.7.0.jar:1.7.0]
> at
> org.apache.drill.exec.work.foreman.Foreman.moveToState(Foreman.java:901)
> [drill-java-exec-1.7.0.jar:1.7.0]
> at org.apache.drill.exec.work.foreman.Foreman.run(Foreman.java:271)
> [drill-java-exec-1.7.0.jar:1.7.0]
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> [na:1.7.0_80]
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> [na:1.7.0_80]
> at java.lang.Thread.run(Thread.java:745) [na:1.7.0_80]
> Caused by: org.apache.drill.exec.work.foreman.ForemanException: Unexpected
> exception during fragment initialization: null
> ... 4 common frames omitted
> Caused by: java.lang.NullPointerException: null
> at
> org.apache.drill.exec.planner.sql.handlers.FindLimit0Visitor$FindHardDistributionScans.visit(FindLimit0Visitor.java:262)
> ~[drill-java-exec-1.7.0.jar:1.7.0]
> at org.apache.calcite.rel.core.TableScan.accept(TableScan.java:166)
> ~[calcite-core-1.4.0-drill-r11.jar:1.4.0-drill-r11]
> at
> org.apache.calcite.rel.RelShuttleImpl.visitChild(RelShuttleImpl.java:53)
> ~[calcite-core-1.4.0-drill-r11.jar:1.4.0-drill-r11]
> at
> org.apache.calcite.rel.RelShuttleImpl.visitChildren(RelShuttleImpl.java:68)
> ~[calcite-core-1.4.0-drill-r11.jar:1.4.0-drill-r11]
> at org.apache.calcite.rel.RelShuttleImpl.visit(RelShuttleImpl.java:126)
> ~[calcite-core-1.4.0-drill-r11.jar:1.4.0-drill-r11]
> at
> org.apache.calcite.rel.AbstractRelNode.accept(AbstractRelNode.java:256)
> ~[calcite-core-1.4.0-drill-r11.jar:1.4.0-drill-r11]
> at
> org.apache.calcite.rel.RelShuttleImpl.visitChild(RelShuttleImpl.java:53)
> ~[calcite-core-1.4.0-drill-r11.jar:1.4.0-drill-r11]
> at
> org.apache.calcite.rel.RelShuttleImpl.visitChildren(RelShuttleImpl.java:68)
> ~[calcite-core-1.4.0-drill-r11.jar:1.4.0-drill-r11]
> at org.apache.calcite.rel.RelShuttleImpl.visit(RelShuttleImpl.java:126)
> ~[calcite-core-1.4.0-drill-r11.jar:1.4.0-drill-r11]
> at
> org.apache.calcite.rel.AbstractRelNode.accept(AbstractRelNode.java:256)
> ~[calcite-core-1.4.0-drill-r11.jar:1.4.0-drill-r11]
> at
> org.apache.calcite.rel.RelShuttleImpl.visitChild(RelShuttleImpl.java:53)
> ~[calcite-core-1.4.0-drill-r11.jar:1.4.0-drill-r11]
> at
> org.apache.calcite.rel.RelShuttleImpl.visitChildren(RelShuttleImpl.java:68)
> ~[calcite-core-1.4.0-drill-r11.jar:1.4.0-drill-r11]
> at org.apache.calcite.rel.RelShuttleImpl.visit(RelShuttleImpl.java:126)
> ~[calcite-core-1.4.0-drill-r11.jar:1.4.0-drill-r11]
> at
> org.apache.calcite.rel.AbstractRelNode.accept(AbstractRelNode.java:256)
> ~[calcite-core-1.4.0-drill-r11.jar:1.4.0-drill-r11]
> at
> org.apache.calcite.rel.RelShuttleImpl.visitChild(RelShuttleImpl.java:53)
> ~[calcite-core-1.4.0-drill-r11.jar:1.4.0-drill-r11]
> at
> org.apache.calcite.rel.RelShuttleImpl.visitChildren(RelShuttleImpl.java:68)
> ~[calcite-core-1.4.0-drill-r11.jar:1.4.0-drill-r11]
> at org.apache.calcite.rel.RelShuttleImpl.visit(RelShuttleImpl.java:126)
> ~[calcite-core-1.4.0-drill-r11.jar:1.4.0-drill-r11]
> at
> org.apache.calcite.rel.AbstractRelNode.accept(AbstractRelNode.java:256)
> ~[calcite-core-1.4.0-drill-r11.jar:1.4.0-drill-r11]
> at
> org.apache.drill.exec.planner.sql.handlers.FindLimit0Visitor.containsLimit0(FindLimit0Visitor.java:129)
> ~[drill-java-exec-1.7.0.jar:1.7.0]
> at
> org.apache.drill.exec.planner.sql.handlers.DefaultSqlHandler.convertToDrel(DefaultSqlHandler.java:259)
> ~[drill-java-exec-1.7.0.jar:1.7.0]
> at
> org.apache.drill.exec.planner.sql.handlers.DefaultSqlHandler.convertToDrel(DefaultSqlHandler.java:286)
> ~[drill-java-exec-1.7.0.jar:1.7.0]
> at
> org.apache.drill.exec.planner.sql.handlers.DefaultSqlHandler.getPlan(DefaultSqlHandler.java:168)
> ~[drill-java-exec-1.7.0.jar:1.7.0]
> at
> org.apache.drill.exec.planner.sql.DrillSqlWorker.getPlan(DrillSqlWorker.java:94)
> ~[drill-java-exec-1.7.0.jar:1.7.0]
> at org.apache.drill.exec.work.foreman.Foreman.runSQL(Foreman.java:978)
> [drill-java-exec-1.7.0.jar:1.7.0]
> at org.apache.drill.exec.work.foreman.Foreman.run(Foreman.java:257)
> [drill-java-exec-1.7.0.jar:1.7.0]
> ... 3 common frames omitted
> {code}
> I am using Apache Drill 1.7 on a Ubuntu 14.04 Server Connecting to MySql 5.7.
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