[
https://issues.apache.org/jira/browse/DRILL-3119?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Pritesh Maker updated DRILL-3119:
---------------------------------
Fix Version/s: (was: 1.11.0)
> Query stays in "CANCELLATION_REQUESTED" status in UI after OOM of Direct
> buffer memory
> --------------------------------------------------------------------------------------
>
> Key: DRILL-3119
> URL: https://issues.apache.org/jira/browse/DRILL-3119
> Project: Apache Drill
> Issue Type: Bug
> Components: Execution - Flow
> Affects Versions: 1.0.0
> Reporter: Hao Zhu
>
> Tested in 1.0.0 with below commit id:
> {code}
> > select * from sys.version;
> +-------------------------------------------+--------------------------------------------------------------------+----------------------------+--------------+----------------------------+
> | commit_id |
> commit_message | commit_time |
> build_email | build_time |
> +-------------------------------------------+--------------------------------------------------------------------+----------------------------+--------------+----------------------------+
> | d8b19759657698581cc0d01d7038797952888123 | DRILL-3100:
> TestImpersonationDisabledWithMiniDFS fails on Windows | 15.05.2015 @
> 01:18:03 EDT | Unknown | 15.05.2015 @ 03:07:10 EDT |
> +-------------------------------------------+--------------------------------------------------------------------+----------------------------+--------------+----------------------------+
> 1 row selected (0.26 seconds)
> {code}
> How to reproduce:
> 1. Single node cluster.
> 2. Reduce DRILL_MAX_DIRECT_MEMORY="2G".
> 3. Run a hash join which is big enough to trigger OOM.
> eg:
> {code}
> select count(*) from
> (
> select a.* from dfs.root.`user/hive/warehouse/passwords_csv_big` a,
> dfs.root.`user/hive/warehouse/passwords_csv_big` b
> where a.columns[1]=b.columns[1]
> );
> {code}
> After that, drillbit.log shows OOM:
> {code}
> 2015-05-16 19:24:34,391 [2aa866ba-8939-b184-0ba2-291734329f88:frag:4:4] INFO
> o.a.d.e.w.fragment.FragmentExecutor -
> 2aa866ba-8939-b184-0ba2-291734329f88:4:4: State change requested from RUNNING
> --> FINISHED for
> 2015-05-16 19:24:34,391 [2aa866ba-8939-b184-0ba2-291734329f88:frag:4:4] INFO
> o.a.d.e.w.f.AbstractStatusReporter - State changed for
> 2aa866ba-8939-b184-0ba2-291734329f88:4:4. New state: FINISHED
> 2015-05-16 19:24:38,561 [BitServer-5] ERROR
> o.a.d.exec.rpc.RpcExceptionHandler - Exception in RPC communication.
> Connection: /10.0.0.31:31012 <--> /10.0.0.31:41923 (data server). Closing
> connection.
> io.netty.handler.codec.DecoderException: java.lang.OutOfMemoryError: Direct
> buffer memory
> at
> io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:233)
> ~[netty-codec-4.0.27.Final.jar:4.0.27.Final]
> at
> io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:339)
> [netty-transport-4.0.27.Final.jar:4.0.27.Final]
> at
> io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:324)
> [netty-transport-4.0.27.Final.jar:4.0.27.Final]
> at
> io.netty.channel.ChannelInboundHandlerAdapter.channelRead(ChannelInboundHandlerAdapter.java:86)
> [netty-transport-4.0.27.Final.jar:4.0.27.Final]
> at
> io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:339)
> [netty-transport-4.0.27.Final.jar:4.0.27.Final]
> at
> io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:324)
> [netty-transport-4.0.27.Final.jar:4.0.27.Final]
> at
> io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:847)
> [netty-transport-4.0.27.Final.jar:4.0.27.Final]
> at
> io.netty.channel.epoll.AbstractEpollStreamChannel$EpollStreamUnsafe.epollInReady(AbstractEpollStreamChannel.java:618)
> [netty-transport-native-epoll-4.0.27.Final-linux-x86_64.jar:na]
> at
> io.netty.channel.epoll.EpollEventLoop.processReady(EpollEventLoop.java:329)
> [netty-transport-native-epoll-4.0.27.Final-linux-x86_64.jar:na]
> at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:250)
> [netty-transport-native-epoll-4.0.27.Final-linux-x86_64.jar:na]
> at
> io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:111)
> [netty-common-4.0.27.Final.jar:4.0.27.Final]
> at java.lang.Thread.run(Thread.java:745) [na:1.8.0_45]
> Caused by: java.lang.OutOfMemoryError: Direct buffer memory
> at java.nio.Bits.reserveMemory(Bits.java:658) ~[na:1.8.0_45]
> at java.nio.DirectByteBuffer.<init>(DirectByteBuffer.java:123)
> ~[na:1.8.0_45]
> at java.nio.ByteBuffer.allocateDirect(ByteBuffer.java:311)
> ~[na:1.8.0_45]
> at io.netty.buffer.PoolArena$DirectArena.newChunk(PoolArena.java:437)
> ~[netty-buffer-4.0.27.Final.jar:4.0.27.Final]
> at io.netty.buffer.PoolArena.allocateNormal(PoolArena.java:179)
> ~[netty-buffer-4.0.27.Final.jar:4.0.27.Final]
> at io.netty.buffer.PoolArena.allocate(PoolArena.java:168)
> ~[netty-buffer-4.0.27.Final.jar:4.0.27.Final]
> at io.netty.buffer.PoolArena.reallocate(PoolArena.java:280)
> ~[netty-buffer-4.0.27.Final.jar:4.0.27.Final]
> at io.netty.buffer.PooledByteBuf.capacity(PooledByteBuf.java:110)
> ~[netty-buffer-4.0.27.Final.jar:4.0.27.Final]
> at
> io.netty.buffer.AbstractByteBuf.ensureWritable(AbstractByteBuf.java:251)
> ~[netty-buffer-4.0.27.Final.jar:4.0.27.Final]
> at io.netty.buffer.AbstractByteBuf.writeBytes(AbstractByteBuf.java:849)
> ~[netty-buffer-4.0.27.Final.jar:4.0.27.Final]
> at io.netty.buffer.AbstractByteBuf.writeBytes(AbstractByteBuf.java:841)
> ~[netty-buffer-4.0.27.Final.jar:4.0.27.Final]
> at io.netty.buffer.AbstractByteBuf.writeBytes(AbstractByteBuf.java:831)
> ~[netty-buffer-4.0.27.Final.jar:4.0.27.Final]
> at io.netty.buffer.WrappedByteBuf.writeBytes(WrappedByteBuf.java:600)
> ~[netty-buffer-4.0.27.Final.jar:4.0.27.Final]
> at
> io.netty.buffer.UnsafeDirectLittleEndian.writeBytes(UnsafeDirectLittleEndian.java:28)
> ~[drill-java-exec-1.0.0-SNAPSHOT-rebuffed.jar:4.0.27.Final]
> at
> io.netty.handler.codec.ByteToMessageDecoder$1.cumulate(ByteToMessageDecoder.java:92)
> ~[netty-codec-4.0.27.Final.jar:4.0.27.Final]
> at
> io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:227)
> ~[netty-codec-4.0.27.Final.jar:4.0.27.Final]
> ... 11 common frames omitted
> 2015-05-16 19:24:38,562 [BitClient-1] ERROR
> o.a.d.exec.rpc.RpcExceptionHandler - Exception in RPC communication.
> Connection: /10.0.0.31:41923 <--> /10.0.0.31:31012 (data client). Closing
> connection.
> java.io.IOException: syscall:read(...)() failed: Connection reset by peer
> 2015-05-16 19:24:38,562 [BitClient-1] INFO
> o.a.drill.exec.rpc.data.DataClient - Channel closed /10.0.0.31:41923 <-->
> /10.0.0.31:31012.
> 2015-05-16 19:24:38,563 [BitServer-5] WARN
> o.a.d.exec.rpc.RpcExceptionHandler - Exception occurred with closed channel.
> Connection: /10.0.0.31:31012 <--> /10.0.0.31:41923 (data server)
> java.nio.channels.ClosedChannelException: null
> 2015-05-16 19:24:38,564 [BitServer-5] INFO
> o.a.d.exec.rpc.ProtobufLengthDecoder - Channel is closed, discarding
> remaining 100358 byte(s) in buffer.
> 2015-05-16 19:25:36,820 [UserServer-1] INFO
> o.a.drill.exec.work.foreman.Foreman - State change requested. RUNNING -->
> CANCELLATION_REQUESTED
> 2015-05-16 19:25:36,825 [BitServer-4] INFO
> o.a.d.e.w.fragment.FragmentExecutor -
> 2aa866ba-8939-b184-0ba2-291734329f88:0:0: State change requested from RUNNING
> --> CANCELLATION_REQUESTED for
> 2015-05-16 19:25:36,825 [BitServer-4] INFO
> o.a.d.e.w.f.AbstractStatusReporter - State changed for
> 2aa866ba-8939-b184-0ba2-291734329f88:0:0. New state: CANCELLATION_REQUESTED
> 2015-05-16 19:25:36,827 [2aa866ba-8939-b184-0ba2-291734329f88:frag:0:0] INFO
> o.a.d.e.w.fragment.FragmentExecutor -
> 2aa866ba-8939-b184-0ba2-291734329f88:0:0: State change requested from
> CANCELLATION_REQUESTED --> FINISHED for
> 2015-05-16 19:25:36,827 [2aa866ba-8939-b184-0ba2-291734329f88:frag:0:0] INFO
> o.a.d.e.w.f.AbstractStatusReporter - State changed for
> 2aa866ba-8939-b184-0ba2-291734329f88:0:0. New state: CANCELLED
> 2015-05-16 19:25:36,827 [BitServer-4] INFO
> o.a.d.e.w.fragment.FragmentExecutor -
> 2aa866ba-8939-b184-0ba2-291734329f88:5:0: State change requested from RUNNING
> --> CANCELLATION_REQUESTED for
> 2015-05-16 19:25:36,827 [BitServer-4] INFO
> o.a.d.e.w.f.AbstractStatusReporter - State changed for
> 2aa866ba-8939-b184-0ba2-291734329f88:5:0. New state: CANCELLATION_REQUESTED
> 2015-05-16 19:25:36,827 [WorkManager-28] WARN
> o.a.d.exec.rpc.control.WorkEventBus - Fragment
> 2aa866ba-8939-b184-0ba2-291734329f88:0:0 not found in the work bus.
> 2015-05-16 19:25:36,831 [BitServer-4] INFO
> o.a.d.e.w.fragment.FragmentExecutor -
> 2aa866ba-8939-b184-0ba2-291734329f88:5:1: State change requested from RUNNING
> --> CANCELLATION_REQUESTED for
> 2015-05-16 19:25:36,832 [BitServer-4] INFO
> o.a.d.e.w.f.AbstractStatusReporter - State changed for
> 2aa866ba-8939-b184-0ba2-291734329f88:5:1. New state: CANCELLATION_REQUESTED
> 2015-05-16 19:25:36,832 [BitServer-4] INFO
> o.a.d.e.w.fragment.FragmentExecutor -
> 2aa866ba-8939-b184-0ba2-291734329f88:5:2: State change requested from RUNNING
> --> CANCELLATION_REQUESTED for
> 2015-05-16 19:25:36,832 [BitServer-4] INFO
> o.a.d.e.w.f.AbstractStatusReporter - State changed for
> 2aa866ba-8939-b184-0ba2-291734329f88:5:2. New state: CANCELLATION_REQUESTED
> 2015-05-16 19:25:36,833 [BitServer-4] INFO
> o.a.d.e.w.fragment.FragmentExecutor -
> 2aa866ba-8939-b184-0ba2-291734329f88:5:3: State change requested from RUNNING
> --> CANCELLATION_REQUESTED for
> 2015-05-16 19:25:36,833 [BitServer-4] INFO
> o.a.d.e.w.f.AbstractStatusReporter - State changed for
> 2aa866ba-8939-b184-0ba2-291734329f88:5:3. New state: CANCELLATION_REQUESTED
> 2015-05-16 19:25:36,834 [BitServer-4] INFO
> o.a.d.e.w.fragment.FragmentExecutor -
> 2aa866ba-8939-b184-0ba2-291734329f88:5:4: State change requested from RUNNING
> --> CANCELLATION_REQUESTED for
> 2015-05-16 19:25:36,834 [BitServer-4] INFO
> o.a.d.e.w.f.AbstractStatusReporter - State changed for
> 2aa866ba-8939-b184-0ba2-291734329f88:5:4. New state: CANCELLATION_REQUESTED
> 2015-05-16 19:25:36,835 [BitServer-4] INFO
> o.a.d.e.w.fragment.FragmentExecutor -
> 2aa866ba-8939-b184-0ba2-291734329f88:5:5: State change requested from RUNNING
> --> CANCELLATION_REQUESTED for
> 2015-05-16 19:25:36,835 [BitServer-4] INFO
> o.a.d.e.w.f.AbstractStatusReporter - State changed for
> 2aa866ba-8939-b184-0ba2-291734329f88:5:5. New state: CANCELLATION_REQUESTED
> 2015-05-16 19:25:36,836 [BitServer-4] INFO
> o.a.d.e.w.fragment.FragmentExecutor -
> 2aa866ba-8939-b184-0ba2-291734329f88:2:0: State change requested from RUNNING
> --> CANCELLATION_REQUESTED for
> 2015-05-16 19:25:36,836 [BitServer-4] INFO
> o.a.d.e.w.f.AbstractStatusReporter - State changed for
> 2aa866ba-8939-b184-0ba2-291734329f88:2:0. New state: CANCELLATION_REQUESTED
> 2015-05-16 19:25:36,837 [BitServer-4] INFO
> o.a.d.e.w.fragment.FragmentExecutor -
> 2aa866ba-8939-b184-0ba2-291734329f88:1:0: State change requested from RUNNING
> --> CANCELLATION_REQUESTED for
> 2015-05-16 19:25:36,838 [BitServer-4] INFO
> o.a.d.e.w.f.AbstractStatusReporter - State changed for
> 2aa866ba-8939-b184-0ba2-291734329f88:1:0. New state: CANCELLATION_REQUESTED
> 2015-05-16 19:25:36,839 [BitServer-4] INFO
> o.a.d.e.w.fragment.FragmentExecutor -
> 2aa866ba-8939-b184-0ba2-291734329f88:1:1: State change requested from RUNNING
> --> CANCELLATION_REQUESTED for
> 2015-05-16 19:25:36,839 [BitServer-4] INFO
> o.a.d.e.w.f.AbstractStatusReporter - State changed for
> 2aa866ba-8939-b184-0ba2-291734329f88:1:1. New state: CANCELLATION_REQUESTED
> 2015-05-16 19:25:36,839 [BitServer-4] INFO
> o.a.d.e.w.fragment.FragmentExecutor -
> 2aa866ba-8939-b184-0ba2-291734329f88:1:2: State change requested from RUNNING
> --> CANCELLATION_REQUESTED for
> 2015-05-16 19:25:36,839 [BitServer-4] INFO
> o.a.d.e.w.f.AbstractStatusReporter - State changed for
> 2aa866ba-8939-b184-0ba2-291734329f88:1:2. New state: CANCELLATION_REQUESTED
> 2015-05-16 19:25:36,843 [BitServer-4] INFO
> o.a.d.e.w.fragment.FragmentExecutor -
> 2aa866ba-8939-b184-0ba2-291734329f88:1:3: State change requested from RUNNING
> --> CANCELLATION_REQUESTED for
> 2015-05-16 19:25:36,848 [BitServer-4] INFO
> o.a.d.e.w.f.AbstractStatusReporter - State changed for
> 2aa866ba-8939-b184-0ba2-291734329f88:1:3. New state: CANCELLATION_REQUESTED
> 2015-05-16 19:25:36,849 [BitServer-4] INFO
> o.a.d.e.w.fragment.FragmentExecutor -
> 2aa866ba-8939-b184-0ba2-291734329f88:1:4: State change requested from RUNNING
> --> CANCELLATION_REQUESTED for
> 2015-05-16 19:25:36,849 [BitServer-4] INFO
> o.a.d.e.w.f.AbstractStatusReporter - State changed for
> 2aa866ba-8939-b184-0ba2-291734329f88:1:4. New state: CANCELLATION_REQUESTED
> 2015-05-16 19:25:36,849 [BitServer-4] INFO
> o.a.d.e.w.fragment.FragmentExecutor -
> 2aa866ba-8939-b184-0ba2-291734329f88:1:5: State change requested from RUNNING
> --> CANCELLATION_REQUESTED for
> 2015-05-16 19:25:36,850 [BitServer-4] INFO
> o.a.d.e.w.f.AbstractStatusReporter - State changed for
> 2aa866ba-8939-b184-0ba2-291734329f88:1:5. New state: CANCELLATION_REQUESTED
> 2015-05-16 19:25:36,850 [BitServer-4] INFO
> o.a.d.e.w.fragment.FragmentExecutor -
> 2aa866ba-8939-b184-0ba2-291734329f88:3:0: State change requested from RUNNING
> --> CANCELLATION_REQUESTED for
> 2015-05-16 19:25:36,850 [BitServer-4] INFO
> o.a.d.e.w.f.AbstractStatusReporter - State changed for
> 2aa866ba-8939-b184-0ba2-291734329f88:3:0. New state: CANCELLATION_REQUESTED
> 2015-05-16 19:25:36,851 [BitServer-4] INFO
> o.a.d.e.w.fragment.FragmentExecutor -
> 2aa866ba-8939-b184-0ba2-291734329f88:4:1: State change requested from RUNNING
> --> CANCELLATION_REQUESTED for
> 2015-05-16 19:25:36,851 [BitServer-4] INFO
> o.a.d.e.w.f.AbstractStatusReporter - State changed for
> 2aa866ba-8939-b184-0ba2-291734329f88:4:1. New state: CANCELLATION_REQUESTED
> 2015-05-16 19:25:36,854 [BitServer-4] INFO
> o.a.d.e.w.fragment.FragmentExecutor -
> 2aa866ba-8939-b184-0ba2-291734329f88:4:3: State change requested from RUNNING
> --> CANCELLATION_REQUESTED for
> 2015-05-16 19:25:36,854 [BitServer-4] INFO
> o.a.d.e.w.f.AbstractStatusReporter - State changed for
> 2aa866ba-8939-b184-0ba2-291734329f88:4:3. New state: CANCELLATION_REQUESTED
> 2015-05-16 19:25:36,854 [BitServer-4] INFO
> o.a.d.e.w.fragment.FragmentExecutor -
> 2aa866ba-8939-b184-0ba2-291734329f88:4:5: State change requested from RUNNING
> --> CANCELLATION_REQUESTED for
> 2015-05-16 19:25:36,854 [BitServer-4] INFO
> o.a.d.e.w.f.AbstractStatusReporter - State changed for
> 2aa866ba-8939-b184-0ba2-291734329f88:4:5. New state: CANCELLATION_REQUESTED
> 2015-05-16 19:25:36,964 [2aa866ba-8939-b184-0ba2-291734329f88:frag:1:0] INFO
> o.a.d.e.w.fragment.FragmentExecutor -
> 2aa866ba-8939-b184-0ba2-291734329f88:1:0: State change requested from
> CANCELLATION_REQUESTED --> FINISHED for
> 2015-05-16 19:25:36,964 [2aa866ba-8939-b184-0ba2-291734329f88:frag:1:0] INFO
> o.a.d.e.w.f.AbstractStatusReporter - State changed for
> 2aa866ba-8939-b184-0ba2-291734329f88:1:0. New state: CANCELLED
> 2015-05-16 19:25:36,965 [WorkManager-21] WARN
> o.a.d.exec.rpc.control.WorkEventBus - Fragment
> 2aa866ba-8939-b184-0ba2-291734329f88:1:0 not found in the work bus.
> 2015-05-16 19:25:36,997 [2aa866ba-8939-b184-0ba2-291734329f88:frag:1:4] INFO
> o.a.d.e.w.fragment.FragmentExecutor -
> 2aa866ba-8939-b184-0ba2-291734329f88:1:4: State change requested from
> CANCELLATION_REQUESTED --> FINISHED for
> 2015-05-16 19:25:36,997 [2aa866ba-8939-b184-0ba2-291734329f88:frag:1:4] INFO
> o.a.d.e.w.f.AbstractStatusReporter - State changed for
> 2aa866ba-8939-b184-0ba2-291734329f88:1:4. New state: CANCELLED
> 2015-05-16 19:25:36,997 [WorkManager-26] WARN
> o.a.d.exec.rpc.control.WorkEventBus - Fragment
> 2aa866ba-8939-b184-0ba2-291734329f88:1:4 not found in the work bus.
> 2015-05-16 19:25:37,032 [2aa866ba-8939-b184-0ba2-291734329f88:frag:1:2] INFO
> o.a.d.e.w.fragment.FragmentExecutor -
> 2aa866ba-8939-b184-0ba2-291734329f88:1:2: State change requested from
> CANCELLATION_REQUESTED --> FINISHED for
> 2015-05-16 19:25:37,032 [2aa866ba-8939-b184-0ba2-291734329f88:frag:1:2] INFO
> o.a.d.e.w.f.AbstractStatusReporter - State changed for
> 2aa866ba-8939-b184-0ba2-291734329f88:1:2. New state: CANCELLED
> 2015-05-16 19:25:37,033 [WorkManager-23] WARN
> o.a.d.exec.rpc.control.WorkEventBus - Fragment
> 2aa866ba-8939-b184-0ba2-291734329f88:1:2 not found in the work bus.
> 2015-05-16 19:25:37,079 [2aa866ba-8939-b184-0ba2-291734329f88:frag:1:5] INFO
> o.a.d.e.w.fragment.FragmentExecutor -
> 2aa866ba-8939-b184-0ba2-291734329f88:1:5: State change requested from
> CANCELLATION_REQUESTED --> FINISHED for
> 2015-05-16 19:25:37,079 [2aa866ba-8939-b184-0ba2-291734329f88:frag:1:5] INFO
> o.a.d.e.w.f.AbstractStatusReporter - State changed for
> 2aa866ba-8939-b184-0ba2-291734329f88:1:5. New state: CANCELLED
> 2015-05-16 19:25:37,079 [WorkManager-17] WARN
> o.a.d.exec.rpc.control.WorkEventBus - Fragment
> 2aa866ba-8939-b184-0ba2-291734329f88:1:5 not found in the work bus.
> 2015-05-16 19:25:37,269 [2aa866ba-8939-b184-0ba2-291734329f88:frag:1:3] INFO
> o.a.d.e.w.fragment.FragmentExecutor -
> 2aa866ba-8939-b184-0ba2-291734329f88:1:3: State change requested from
> CANCELLATION_REQUESTED --> FINISHED for
> 2015-05-16 19:25:37,269 [2aa866ba-8939-b184-0ba2-291734329f88:frag:1:3] INFO
> o.a.d.e.w.f.AbstractStatusReporter - State changed for
> 2aa866ba-8939-b184-0ba2-291734329f88:1:3. New state: CANCELLED
> 2015-05-16 19:25:37,274 [WorkManager-24] WARN
> o.a.d.exec.rpc.control.WorkEventBus - Fragment
> 2aa866ba-8939-b184-0ba2-291734329f88:1:3 not found in the work bus.
> 2015-05-16 19:25:37,379 [2aa866ba-8939-b184-0ba2-291734329f88:frag:1:1] INFO
> o.a.d.e.w.fragment.FragmentExecutor -
> 2aa866ba-8939-b184-0ba2-291734329f88:1:1: State change requested from
> CANCELLATION_REQUESTED --> FINISHED for
> 2015-05-16 19:25:37,379 [2aa866ba-8939-b184-0ba2-291734329f88:frag:1:1] INFO
> o.a.d.e.w.f.AbstractStatusReporter - State changed for
> 2aa866ba-8939-b184-0ba2-291734329f88:1:1. New state: CANCELLED
> 2015-05-16 19:25:37,380 [WorkManager-22] WARN
> o.a.d.exec.rpc.control.WorkEventBus - Fragment
> 2aa866ba-8939-b184-0ba2-291734329f88:1:1 not found in the work bus.
> 2015-05-16 19:25:40,209 [UserServer-1] INFO
> o.a.drill.exec.work.foreman.Foreman - State change requested.
> CANCELLATION_REQUESTED --> CANCELLATION_REQUESTED
> {code}
> Since then, the query will stay as "CANCELLATION_REQUESTED" status and can
> not be cleaned without drillbit restart.
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