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From "Chun Chang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DRILL-1700) caught a memory assertion on an order by
Date Thu, 13 Nov 2014 18:58:34 GMT

    [ https://issues.apache.org/jira/browse/DRILL-1700?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14210154#comment-14210154
] 

Chun Chang commented on DRILL-1700:
-----------------------------------

plan without limit:

0: jdbc:drill:schema=dfs> explain plan for select columns[0], columns[1], columns[2] from
`aggregate_1m.csv` order by cast(columns[0] as int);
+------------+------------+
|    text    |    json    |
+------------+------------+
| 00-00    Screen
00-01      Project(EXPR$0=[$0], EXPR$1=[$1], EXPR$2=[$2])
00-02        SelectionVectorRemover
00-03          Sort(sort0=[$3], dir0=[ASC])
00-04            Project(EXPR$0=[ITEM($0, 0)], EXPR$1=[ITEM($0, 1)], EXPR$2=[ITEM($0, 2)],
EXPR$3=[CAST(ITEM($0, 0)):INTEGER NOT NULL])
00-05              Scan(groupscan=[EasyGroupScan [selectionRoot=/drill/testdata/mondrian/aggregate_1m.csv,
numFiles=1, columns=[`columns`[0], `columns`[1], `columns`[2]], files=[maprfs:/drill/testdata/mondrian/aggregate_1m.csv]]])
 | {
  "head" : {
    "version" : 1,
    "generator" : {
      "type" : "ExplainHandler",
      "info" : ""
    },
    "type" : "APACHE_DRILL_PHYSICAL",
    "options" : [ ],
    "queue" : 0,
    "resultMode" : "EXEC"
  },
  "graph" : [ {
    "pop" : "fs-scan",
    "@id" : 5,
    "files" : [ "maprfs:/drill/testdata/mondrian/aggregate_1m.csv" ],
    "storage" : {
      "type" : "file",
      "enabled" : true,
      "connection" : "maprfs:///",
      "workspaces" : {
        "root" : {
          "location" : "/drill/testdata",
          "writable" : false,
          "defaultInputFormat" : null
        },
        "default" : {
          "location" : "/drill/testdata/mondrian",
          "writable" : true,
          "defaultInputFormat" : null
        },
        "tmp" : {
          "location" : "/tmp",
          "writable" : true,
          "defaultInputFormat" : null
        }
      },
      "formats" : {
        "psv" : {
          "type" : "text",
          "extensions" : [ "tbl" ],
          "delimiter" : "|"
        },
        "csv" : {
          "type" : "text",
          "extensions" : [ "csv" ],
          "delimiter" : ","
        },
        "tsv" : {
          "type" : "text",
          "extensions" : [ "tsv" ],
          "delimiter" : "\t"
        },
        "parquet" : {
          "type" : "parquet"
        },
        "json" : {
          "type" : "json"
        }
      }
    },
    "format" : {
      "type" : "text",
      "extensions" : [ "csv" ],
      "delimiter" : ","
    },
    "columns" : [ "`columns`[0]", "`columns`[1]", "`columns`[2]" ],
    "selectionRoot" : "/drill/testdata/mondrian/aggregate_1m.csv",
    "cost" : 52083.0
  }, {
    "pop" : "project",
    "@id" : 4,
    "exprs" : [ {
      "ref" : "`EXPR$0`",
      "expr" : "`columns`[0]"
    }, {
      "ref" : "`EXPR$1`",
      "expr" : "`columns`[1]"
    }, {
      "ref" : "`EXPR$2`",
      "expr" : "`columns`[2]"
    }, {
      "ref" : "`EXPR$3`",
      "expr" : "cast( (`columns`[0] ) as INT )"
    } ],
    "child" : 5,
    "initialAllocation" : 1000000,
    "maxAllocation" : 10000000000,
    "cost" : 52083.0
  }, {
    "pop" : "external-sort",
    "@id" : 3,
    "child" : 4,
    "orderings" : [ {
      "order" : "ASC",
      "expr" : "`EXPR$3`",
      "nullDirection" : "UNSPECIFIED"
    } ],
    "reverse" : false,
    "initialAllocation" : 20000000,
    "maxAllocation" : 10000000000,
    "cost" : 52083.0
  }, {
    "pop" : "selection-vector-remover",
    "@id" : 2,
    "child" : 3,
    "initialAllocation" : 1000000,
    "maxAllocation" : 10000000000,
    "cost" : 52083.0
  }, {
    "pop" : "project",
    "@id" : 1,
    "exprs" : [ {
      "ref" : "`EXPR$0`",
      "expr" : "`EXPR$0`"
    }, {
      "ref" : "`EXPR$1`",
      "expr" : "`EXPR$1`"
    }, {
      "ref" : "`EXPR$2`",
      "expr" : "`EXPR$2`"
    } ],
    "child" : 2,
    "initialAllocation" : 1000000,
    "maxAllocation" : 10000000000,
    "cost" : 52083.0
  }, {
    "pop" : "screen",
    "@id" : 0,
    "child" : 1,
    "initialAllocation" : 1000000,
    "maxAllocation" : 10000000000,
    "cost" : 52083.0
  } ]
} |
+------------+------------+
1 row selected (8.539 seconds)


plan with limit 100:

0: jdbc:drill:schema=dfs> explain plan for select columns[0], columns[1], columns[2] from
`aggregate_1m.csv` order by cast(columns[0] as int) limit 100;
+------------+------------+
|    text    |    json    |
+------------+------------+
| 00-00    Screen
00-01      Project(EXPR$0=[$0], EXPR$1=[$1], EXPR$2=[$2])
00-02        SelectionVectorRemover
00-03          Limit(fetch=[100])
00-04            SelectionVectorRemover
00-05              TopN(limit=[100])
00-06                Project(EXPR$0=[ITEM($0, 0)], EXPR$1=[ITEM($0, 1)], EXPR$2=[ITEM($0,
2)], EXPR$3=[CAST(ITEM($0, 0)):INTEGER NOT NULL])
00-07                  Scan(groupscan=[EasyGroupScan [selectionRoot=/drill/testdata/mondrian/aggregate_1m.csv,
numFiles=1, columns=[`columns`[0], `columns`[1], `columns`[2]], files=[maprfs:/drill/testdata/mondrian/aggregate_1m.csv]]])
 | {
  "head" : {
    "version" : 1,
    "generator" : {
      "type" : "ExplainHandler",
      "info" : ""
    },
    "type" : "APACHE_DRILL_PHYSICAL",
    "options" : [ ],
    "queue" : 0,
    "resultMode" : "EXEC"
  },
  "graph" : [ {
    "pop" : "fs-scan",
    "@id" : 7,
    "files" : [ "maprfs:/drill/testdata/mondrian/aggregate_1m.csv" ],
    "storage" : {
      "type" : "file",
      "enabled" : true,
      "connection" : "maprfs:///",
      "workspaces" : {
        "root" : {
          "location" : "/drill/testdata",
          "writable" : false,
          "defaultInputFormat" : null
        },
        "default" : {
          "location" : "/drill/testdata/mondrian",
          "writable" : true,
          "defaultInputFormat" : null
        },
        "tmp" : {
          "location" : "/tmp",
          "writable" : true,
          "defaultInputFormat" : null
        }
      },
      "formats" : {
        "psv" : {
          "type" : "text",
          "extensions" : [ "tbl" ],
          "delimiter" : "|"
        },
        "csv" : {
          "type" : "text",
          "extensions" : [ "csv" ],
          "delimiter" : ","
        },
        "tsv" : {
          "type" : "text",
          "extensions" : [ "tsv" ],
          "delimiter" : "\t"
        },
        "parquet" : {
          "type" : "parquet"
        },
        "json" : {
          "type" : "json"
        }
      }
    },
    "format" : {
      "type" : "text",
      "extensions" : [ "csv" ],
      "delimiter" : ","
    },
    "columns" : [ "`columns`[0]", "`columns`[1]", "`columns`[2]" ],
    "selectionRoot" : "/drill/testdata/mondrian/aggregate_1m.csv",
    "cost" : 52083.0
  }, {
    "pop" : "project",
    "@id" : 6,
    "exprs" : [ {
      "ref" : "`EXPR$0`",
      "expr" : "`columns`[0]"
    }, {
      "ref" : "`EXPR$1`",
      "expr" : "`columns`[1]"
    }, {
      "ref" : "`EXPR$2`",
      "expr" : "`columns`[2]"
    }, {
      "ref" : "`EXPR$3`",
      "expr" : "cast( (`columns`[0] ) as INT )"
    } ],
    "child" : 7,
    "initialAllocation" : 1000000,
    "maxAllocation" : 10000000000,
    "cost" : 52083.0
  }, {
    "pop" : "top-n",
    "@id" : 5,
    "child" : 6,
    "orderings" : [ {
      "order" : "ASC",
      "expr" : "`EXPR$3`",
      "nullDirection" : "UNSPECIFIED"
    } ],
    "reverse" : false,
    "limit" : 100,
    "initialAllocation" : 1000000,
    "maxAllocation" : 10000000000,
    "cost" : 52083.0
  }, {
    "pop" : "selection-vector-remover",
    "@id" : 4,
    "child" : 5,
    "initialAllocation" : 1000000,
    "maxAllocation" : 10000000000,
    "cost" : 52083.0
  }, {
    "pop" : "limit",
    "@id" : 3,
    "child" : 4,
    "first" : 0,
    "last" : 100,
    "initialAllocation" : 1000000,
    "maxAllocation" : 10000000000,
    "cost" : 52083.0
  }, {
    "pop" : "selection-vector-remover",
    "@id" : 2,
    "child" : 3,
    "initialAllocation" : 1000000,
    "maxAllocation" : 10000000000,
    "cost" : 52083.0
  }, {
    "pop" : "project",
    "@id" : 1,
    "exprs" : [ {
      "ref" : "`EXPR$0`",
      "expr" : "`EXPR$0`"
    }, {
      "ref" : "`EXPR$1`",
      "expr" : "`EXPR$1`"
    }, {
      "ref" : "`EXPR$2`",
      "expr" : "`EXPR$2`"
    } ],
    "child" : 2,
    "initialAllocation" : 1000000,
    "maxAllocation" : 10000000000,
    "cost" : 52083.0
  }, {
    "pop" : "screen",
    "@id" : 0,
    "child" : 1,
    "initialAllocation" : 1000000,
    "maxAllocation" : 10000000000,
    "cost" : 52083.0
  } ]
} |
+------------+------------+
1 row selected (0.793 seconds)


> caught a memory assertion on an order by
> ----------------------------------------
>
>                 Key: DRILL-1700
>                 URL: https://issues.apache.org/jira/browse/DRILL-1700
>             Project: Apache Drill
>          Issue Type: Bug
>          Components: Query Planning & Optimization
>    Affects Versions: 0.7.0
>            Reporter: Chun Chang
>            Assignee: Parth Chandra
>            Priority: Blocker
>
> #Wed Nov 12 13:06:45 EST 2014
> git.commit.id.abbrev=1e21045
> The following query on a 1 million row data caused a memory assertion.
> 0: jdbc:drill:schema=dfs> select columns[0], columns[1], columns[2] from `aggregate_1m.csv`
order by cast(columns[0] as int);
> +------------+------------+------------+
> |   EXPR$0   |   EXPR$1   |   EXPR$2   |
> +------------+------------+------------+
> Query failed: Failure while running fragment.[ 7bc42b6c-c00a-41c2-af43-331655e5a178 on
qa-node119.qa.lab:31010 ]
> java.lang.RuntimeException: java.sql.SQLException: Failure while executing query.
> 	at sqlline.SqlLine$IncrementalRows.hasNext(SqlLine.java:2514)
> 	at sqlline.SqlLine$TableOutputFormat.print(SqlLine.java:2148)
> 	at sqlline.SqlLine.print(SqlLine.java:1809)
> The same query adding a limit (say limit 100) worked. Here is the assertion stack in
drill bit log:
> 2014-11-12 15:16:22,864 [f89183d7-f94d-4ece-818f-8e597859d529:frag:0:0] WARN  o.a.d.e.w.fragment.FragmentExecutor
- Error while initializing or executing fragment
> java.lang.AssertionError: null
>         at org.apache.drill.exec.memory.AtomicRemainder.get(AtomicRemainder.java:126)
~[drill-java-exec-0.7.0-incubating-SNAPSHOT-rebuffed.jar:0.7.0-incubating-SNAPSHOT]
>         at org.apache.drill.exec.memory.AtomicRemainder.forceGet(AtomicRemainder.java:85)
~[drill-java-exec-0.7.0-incubating-SNAPSHOT-rebuffed.jar:0.7.0-incubating-SNAPSHOT]
>         at org.apache.drill.exec.memory.Accountor.forceAdditionalReservation(Accountor.java:142)
~[drill-java-exec-0.7.0-incubating-SNAPSHOT-rebuffed.jar:0.7.0-incubating-SNAPSHOT]
>         at org.apache.drill.exec.memory.Accountor.transferTo(Accountor.java:111) ~[drill-java-exec-0.7.0-incubating-SNAPSHOT-rebuffed.jar:0.7.0-incubating-SNAPSHOT]
>         at io.netty.buffer.DrillBuf.transferAccounting(DrillBuf.java:182) ~[drill-java-exec-0.7.0-incubating-SNAPSHOT-rebuffed.jar:4.0.24.Final]
>         at org.apache.drill.exec.memory.TopLevelAllocator$ChildAllocator.takeOwnership(TopLevelAllocator.java:192)
~[drill-java-exec-0.7.0-incubating-SNAPSHOT-rebuffed.jar:0.7.0-incubating-SNAPSHOT]
>         at org.apache.drill.exec.physical.impl.xsort.ExternalSortBatch.takeOwnership(ExternalSortBatch.java:464)
~[drill-java-exec-0.7.0-incubating-SNAPSHOT-rebuffed.jar:0.7.0-incubating-SNAPSHOT]



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