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From "Christopher Altman (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DRILL-4863) JDBC Storage Plugin SYSTEM ERROR: NullPointerException Error
Date Thu, 25 Aug 2016 18:36:20 GMT

    [ https://issues.apache.org/jira/browse/DRILL-4863?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15437429#comment-15437429
] 

Christopher Altman commented on DRILL-4863:
-------------------------------------------

{code}
0: jdbc:drill:zk=local> !set maxwidth 10000
0: jdbc:drill:zk=local> explain plan for SELECT * FROM (SELECT count(*) from mysql.scan_test_data.acme_sales
) T LIMIT 0;
Error: SYSTEM ERROR: NullPointerException


[Error Id: 053cb4d5-ca44-4f64-bda5-e7352532d15e on 10.0.1.241:31010] (state=,code=0)
{code}


AND when changing the limit to 1


{code}
0: jdbc:drill:zk=local> explain plan for SELECT * FROM (SELECT count(*) from mysql.scan_test_data.acme_sales
) T LIMIT 1;
+------+------+
| text | json |
+------+------+
| 00-00    Screen
00-01      SelectionVectorRemover
00-02        Limit(fetch=[1])
00-03          Jdbc(sql=[SELECT COUNT(*) AS `EXPR$0`
FROM (SELECT 0 AS `$f0`
FROM `scan_test_data`.`acme_sales`) AS `t`])
 | {
  "head" : {
    "version" : 1,
    "generator" : {
      "type" : "ExplainHandler",
      "info" : ""
    },
    "type" : "APACHE_DRILL_PHYSICAL",
    "options" : [ ],
    "queue" : 0,
    "resultMode" : "EXEC"
  },
  "graph" : [ {
    "pop" : "jdbc-scan",
    "@id" : 3,
    "sql" : "SELECT COUNT(*) AS `EXPR$0`\nFROM (SELECT 0 AS `$f0`\nFROM `scan_test_data`.`acme_sales`)
AS `t`",
    "config" : {
      "type" : "jdbc",
      "driver" : "com.mysql.jdbc.Driver",
      "url" : "jdbc:mysql://dev-db.emcien.com:3306",
      "username" : "scan_test_data",
      "password" : "****",
      "enabled" : true
    },
    "userName" : "",
    "cost" : 1.0
  }, {
    "pop" : "limit",
    "@id" : 2,
    "child" : 3,
    "first" : 0,
    "last" : 1,
    "initialAllocation" : 1000000,
    "maxAllocation" : 10000000000,
    "cost" : 1.0
  }, {
    "pop" : "selection-vector-remover",
    "@id" : 1,
    "child" : 2,
    "initialAllocation" : 1000000,
    "maxAllocation" : 10000000000,
    "cost" : 1.0
  }, {
    "pop" : "screen",
    "@id" : 0,
    "child" : 1,
    "initialAllocation" : 1000000,
    "maxAllocation" : 10000000000,
    "cost" : 1.0
  } ]
} |
+------+------+
1 row selected (0.464 seconds)
{code}

> 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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