[ 
https://issues.apache.org/jira/browse/YARN-7176?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

lujie updated YARN-7176:
------------------------
    Description: 
submit a job, when the job is starting Appmaster Containers(eg. 
startContainers) , then send kill command.  After RM receive kill command, it 
will perform state store(eg.updateApplicationStateInternal).

the startContainers  process and updateApplicationStateInternal will call the 
same method  ContainerLaunchContextPBImpl.getProto which lack of the 
synchronization(also can be called in reInitializeContainer method), the RM log 
will show below. 
{code:java}
2017-09-08 02:34:37,967 INFO 
org.apache.hadoop.yarn.server.resourcemanager.amlauncher.AMLauncher: Error 
launching appattempt_1504809243340_0001_000001. Got exception: 
java.lang.ArrayIndexOutOfBoundsException: 3
        at java.util.ArrayList.add(ArrayList.java:441)
        at 
com.google.protobuf.AbstractMessageLite$Builder.addAll(AbstractMessageLite.java:330)
        at 
org.apache.hadoop.yarn.proto.YarnProtos$ContainerLaunchContextProto$Builder.addAllApplicationACLs(YarnProtos.java:39956)
        at 
org.apache.hadoop.yarn.api.records.impl.pb.ContainerLaunchContextPBImpl.addApplicationACLs(ContainerLaunchContextPBImpl.java:446)
        at 
org.apache.hadoop.yarn.api.records.impl.pb.ContainerLaunchContextPBImpl.mergeLocalToBuilder(ContainerLaunchContextPBImpl.java:121)
        at 
org.apache.hadoop.yarn.api.records.impl.pb.ContainerLaunchContextPBImpl.mergeLocalToProto(ContainerLaunchContextPBImpl.java:128)
        at 
org.apache.hadoop.yarn.api.records.impl.pb.ContainerLaunchContextPBImpl.getProto(ContainerLaunchContextPBImpl.java:70)
        at 
org.apache.hadoop.yarn.api.protocolrecords.impl.pb.StartContainerRequestPBImpl.convertToProtoFormat(StartContainerRequestPBImpl.java:156)
        at 
org.apache.hadoop.yarn.api.protocolrecords.impl.pb.StartContainerRequestPBImpl.mergeLocalToBuilder(StartContainerRequestPBImpl.java:85)
        at 
org.apache.hadoop.yarn.api.protocolrecords.impl.pb.StartContainerRequestPBImpl.mergeLocalToProto(StartContainerRequestPBImpl.java:95)
        at 
org.apache.hadoop.yarn.api.protocolrecords.impl.pb.StartContainerRequestPBImpl.getProto(StartContainerRequestPBImpl.java:57)
        at 
org.apache.hadoop.yarn.api.protocolrecords.impl.pb.StartContainersRequestPBImpl.convertToProtoFormat(StartContainersRequestPBImpl.java:137)
        at 
org.apache.hadoop.yarn.api.protocolrecords.impl.pb.StartContainersRequestPBImpl.addLocalRequestsToProto(StartContainersRequestPBImpl.java:97)
        at 
org.apache.hadoop.yarn.api.protocolrecords.impl.pb.StartContainersRequestPBImpl.mergeLocalToBuilder(StartContainersRequestPBImpl.java:79)
        at 
org.apache.hadoop.yarn.api.protocolrecords.impl.pb.StartContainersRequestPBImpl.mergeLocalToProto(StartContainersRequestPBImpl.java:72)
        at 
org.apache.hadoop.yarn.api.protocolrecords.impl.pb.StartContainersRequestPBImpl.getProto(StartContainersRequestPBImpl.java:48)
        at 
org.apache.hadoop.yarn.api.impl.pb.client.ContainerManagementProtocolPBClientImpl.startContainers(ContainerManagementProtocolPBClientImpl.java:93)
        at 
org.apache.hadoop.yarn.server.resourcemanager.amlauncher.AMLauncher.launch(AMLauncher.java:119)
        at 
org.apache.hadoop.yarn.server.resourcemanager.amlauncher.AMLauncher.run(AMLauncher.java:254)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:745)

2017-09-08 02:34:37,968 ERROR 
org.apache.hadoop.yarn.server.resourcemanager.recovery.RMStateStore: Error 
updating app: application_1504809243340_0001
java.lang.NullPointerException
        at 
com.google.protobuf.CodedOutputStream.computeMessageSizeNoTag(CodedOutputStream.java:749)
        at 
com.google.protobuf.CodedOutputStream.computeMessageSize(CodedOutputStream.java:530)
        at 
org.apache.hadoop.yarn.proto.YarnProtos$ContainerLaunchContextProto.getSerializedSize(YarnProtos.java:38512)
        at 
com.google.protobuf.CodedOutputStream.computeMessageSizeNoTag(CodedOutputStream.java:749)
        at 
com.google.protobuf.CodedOutputStream.computeMessageSize(CodedOutputStream.java:530)
        at 
org.apache.hadoop.yarn.proto.YarnProtos$ApplicationSubmissionContextProto.getSerializedSize(YarnProtos.java:28481)
        at 
com.google.protobuf.CodedOutputStream.computeMessageSizeNoTag(CodedOutputStream.java:749)
        at 
com.google.protobuf.CodedOutputStream.computeMessageSize(CodedOutputStream.java:530)
        at 
org.apache.hadoop.yarn.proto.YarnServerResourceManagerRecoveryProtos$ApplicationStateDataProto.getSerializedSize(YarnServerResourceManagerRecoveryProtos.java:816)
        at 
com.google.protobuf.AbstractMessageLite.toByteArray(AbstractMessageLite.java:62)
        at 
org.apache.hadoop.yarn.server.resourcemanager.recovery.FileSystemRMStateStore.updateApplicationStateInternal(FileSystemRMStateStore.java:426)
        at 
org.apache.hadoop.yarn.server.resourcemanager.recovery.RMStateStore$UpdateAppTransition.transition(RMStateStore.java:163)
        at 
org.apache.hadoop.yarn.server.resourcemanager.recovery.RMStateStore$UpdateAppTransition.transition(RMStateStore.java:148)
        at 
org.apache.hadoop.yarn.state.StateMachineFactory$SingleInternalArc.doTransition(StateMachineFactory.java:362)
        at 
org.apache.hadoop.yarn.state.StateMachineFactory.doTransition(StateMachineFactory.java:302)
        at 
org.apache.hadoop.yarn.state.StateMachineFactory.access$300(StateMachineFactory.java:46)
        at 
org.apache.hadoop.yarn.state.StateMachineFactory$InternalStateMachine.doTransition(StateMachineFactory.java:448)
        at 
org.apache.hadoop.yarn.server.resourcemanager.recovery.RMStateStore.handleStoreEvent(RMStateStore.java:810)
        at 
org.apache.hadoop.yarn.server.resourcemanager.recovery.RMStateStore$ForwardingEventHandler.handle(RMStateStore.java:864)
        at 
org.apache.hadoop.yarn.server.resourcemanager.recovery.RMStateStore$ForwardingEventHandler.handle(RMStateStore.java:859)
        at 
org.apache.hadoop.yarn.event.AsyncDispatcher.dispatch(AsyncDispatcher.java:173)
        at 
org.apache.hadoop.yarn.event.AsyncDispatcher$1.run(AsyncDispatcher.java:106)
        at java.lang.Thread.run(Thread.java:745)
2017-09-08 02:34:37,978 FATAL 
org.apache.hadoop.yarn.server.resourcemanager.ResourceManager: Received a 
org.apache.hadoop.yarn.server.resourcemanager.RMFatalEvent of type 
STATE_STORE_OP_FAILED. Cause:
java.lang.NullPointerException
        at 
com.google.protobuf.CodedOutputStream.computeMessageSizeNoTag(CodedOutputStream.java:749)
        at 
com.google.protobuf.CodedOutputStream.computeMessageSize(CodedOutputStream.java:530)
        at 
org.apache.hadoop.yarn.proto.YarnProtos$ContainerLaunchContextProto.getSerializedSize(YarnProtos.java:38512)
        at 
com.google.protobuf.CodedOutputStream.computeMessageSizeNoTag(CodedOutputStream.java:749)
        at 
com.google.protobuf.CodedOutputStream.computeMessageSize(CodedOutputStream.java:530)
        at 
org.apache.hadoop.yarn.proto.YarnProtos$ApplicationSubmissionContextProto.getSerializedSize(YarnProtos.java:28481)
        at 
com.google.protobuf.CodedOutputStream.computeMessageSizeNoTag(CodedOutputStream.java:749)
        at 
com.google.protobuf.CodedOutputStream.computeMessageSize(CodedOutputStream.java:530)
        at 
org.apache.hadoop.yarn.proto.YarnServerResourceManagerRecoveryProtos$ApplicationStateDataProto.getSerializedSize(YarnServerResourceManagerRecoveryProtos.java:816)
        at 
com.google.protobuf.AbstractMessageLite.toByteArray(AbstractMessageLite.java:62)
        at 
org.apache.hadoop.yarn.server.resourcemanager.recovery.FileSystemRMStateStore.updateApplicationStateInternal(FileSystemRMStateStore.java:426)
        at 
org.apache.hadoop.yarn.server.resourcemanager.recovery.RMStateStore$UpdateAppTransition.transition(RMStateStore.java:163)
        at 
org.apache.hadoop.yarn.server.resourcemanager.recovery.RMStateStore$UpdateAppTransition.transition(RMStateStore.java:148)
        at 
org.apache.hadoop.yarn.state.StateMachineFactory$SingleInternalArc.doTransition(StateMachineFactory.java:362)
        at 
org.apache.hadoop.yarn.state.StateMachineFactory.doTransition(StateMachineFactory.java:302)
        at 
org.apache.hadoop.yarn.state.StateMachineFactory.access$300(StateMachineFactory.java:46)
        at 
org.apache.hadoop.yarn.state.StateMachineFactory$InternalStateMachine.doTransition(StateMachineFactory.java:448)
        at 
org.apache.hadoop.yarn.server.resourcemanager.recovery.RMStateStore.handleStoreEvent(RMStateStore.java:810)
        at 
org.apache.hadoop.yarn.server.resourcemanager.recovery.RMStateStore$ForwardingEventHandler.handle(RMStateStore.java:864)
        at 
org.apache.hadoop.yarn.server.resourcemanager.recovery.RMStateStore$ForwardingEventHandler.handle(RMStateStore.java:859)
        at 
org.apache.hadoop.yarn.event.AsyncDispatcher.dispatch(AsyncDispatcher.java:173)
        at 
org.apache.hadoop.yarn.event.AsyncDispatcher$1.run(AsyncDispatcher.java:106)
        at java.lang.Thread.run(Thread.java:745)

2017-09-08 02:34:37,987 INFO 
org.apache.hadoop.yarn.server.resourcemanager.rmcontainer.RMContainerImpl: 
container_1504809243340_0001_01_000001 Container Transitioned from ACQUIRED to 
KILLED
2017-09-08 02:34:37,987 INFO 
org.apache.hadoop.yarn.server.resourcemanager.scheduler.common.fica.FiCaSchedulerApp:
 Completed container: container_1504809243340_0001_01_000001 in state: KILLED 
event:KILL
2017-09-08 02:34:37,987 INFO 
org.apache.hadoop.yarn.server.resourcemanager.RMAuditLogger: USER=hires    
OPERATION=AM Released Container TARGET=SchedulerApp     RESULT=SUCCESS  
APPID=application_1504809243340_0001    
CONTAINERID=container_1504809243340_0001_01_000001
2017-09-08 02:34:37,988 INFO 
org.apache.hadoop.yarn.server.resourcemanager.scheduler.SchedulerNode: Released 
container container_1504809243340_0001_01_000001 of capacity <memory:2048, 
vCores:1> on host hadoop11:45454, which currently has 0 containers, <memory:0, 
vCores:0> used and <memory:8096, vCores:8> available, release resources=true
2017-09-08 02:34:37,988 INFO org.apache.hadoop.util.ExitUtil: Exiting with 
status 1
2017-09-08 02:34:37,988 INFO 
org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.LeafQueue: 
default used=<memory:0, vCores:0> numContainers=0 user=hires 
user-resources=<memory:0, vCores:0>
2017-09-08 02:34:37,989 INFO 
org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.LeafQueue: 
completedContainer container=Container: [ContainerId: 
container_1504809243340_0001_01_000001, NodeId: hadoop11:45454, 
NodeHttpAddress: hadoop11:8042, Resource: <memory:2048, vCores:1>, Priority: 0, 
Token: Token { kind: ContainerToken, service: 10.3.1.11:45454 }, ] 
queue=default: capacity=1.0, absoluteCapacity=1.0, usedResources=<memory:0, 
vCores:0>, usedCapacity=0.0, absoluteUsedCapacity=0.0, numApps=1, 
numContainers=0 cluster=<memory:16192, vCores:16>
2017-09-08 02:34:37,989 INFO 
org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.ParentQueue: 
completedContainer queue=root usedCapacity=0.0 absoluteUsedCapacity=0.0 
used=<memory:0, vCores:0> cluster=<memory:16192, vCores:16>
2017-09-08 02:34:37,990 INFO 
org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.ParentQueue: 
Re-sorting completed queue: root.default stats: default: capacity=1.0, 
absoluteCapacity=1.0, usedResources=<memory:0, vCores:0>, usedCapacity=0.0, 
absoluteUsedCapacity=0.0, numApps=1, numContainers=0
2017-09-08 02:34:37,990 INFO 
org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacityScheduler:
 Application attempt appattempt_1504809243340_0001_000001 released container 
container_1504809243340_0001_01_000001 on node: host: hadoop11:45454 
#containers=0 available=8096 used=0 with event: KILL
2017-09-08 02:34:37,990 INFO 
org.apache.hadoop.yarn.server.resourcemanager.scheduler.AppSchedulingInfo: 
Application application_1504809243340_0001 requests cleared
2017-09-08 02:34:37,990 INFO 
org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.LeafQueue: 
Application removed - appId: application_1504809243340_0001 user: hires queue: 
default #user-pending-applications: 0 #user-active-applications: 0 
#queue-pending-applications: 0 #queue-active-applications: 0
2017-09-08 02:34:38,001 ERROR 
org.apache.hadoop.security.token.delegation.AbstractDelegationTokenSecretManager:
 ExpiredTokenRemover received java.lang.InterruptedException: sleep interrupted
2017-09-08 02:34:38,005 INFO org.mortbay.log: Stopped 
HttpServer2$SelectChannelConnectorWithSafeStartup@hadoop11:8088
2017-09-08 02:34:38,005 ERROR 
org.apache.hadoop.security.token.delegation.AbstractDelegationTokenSecretManager:
 ExpiredTokenRemover received java.lang.InterruptedException: sleep interrupted
2017-09-08 02:34:38,006 ERROR 
org.apache.hadoop.security.token.delegation.AbstractDelegationTokenSecretManager:
 ExpiredTokenRemover received java.lang.InterruptedException: sleep interrupted
2017-09-08 02:34:38,108 INFO org.apache.hadoop.ipc.Server: Stopping server on 
8032
2017-09-08 02:34:38,113 INFO org.apache.hadoop.ipc.Server: Stopping IPC Server 
listener on 8032
2017-09-08 02:34:38,113 INFO org.apache.hadoop.ipc.Server: Stopping server on 
8033
2017-09-08 02:34:38,114 INFO org.apache.hadoop.ipc.Server: Stopping IPC Server 
Responder
2017-09-08 02:34:38,114 INFO org.apache.hadoop.ipc.Server: Stopping IPC Server 
listener on 8033
2017-09-08 02:34:38,114 INFO org.apache.hadoop.ipc.Server: Stopping IPC Server 
Responder
{code}

  was:
submit a job, when the job is starting Appmaster Containers(eg. 
startContainers) , then send kill command.  After RM receive kill command, it 
will perform state store(eg.updateApplicationStateInternal).

the startContainers  process and updateApplicationStateInternal will call the 
same method  ContainerLaunchContextPBImpl.getProto which lack of the 
synchronization, the RM log will show below. 
{code:java}
2017-09-08 02:34:37,967 INFO 
org.apache.hadoop.yarn.server.resourcemanager.amlauncher.AMLauncher: Error 
launching appattempt_1504809243340_0001_000001. Got exception: 
java.lang.ArrayIndexOutOfBoundsException: 3
        at java.util.ArrayList.add(ArrayList.java:441)
        at 
com.google.protobuf.AbstractMessageLite$Builder.addAll(AbstractMessageLite.java:330)
        at 
org.apache.hadoop.yarn.proto.YarnProtos$ContainerLaunchContextProto$Builder.addAllApplicationACLs(YarnProtos.java:39956)
        at 
org.apache.hadoop.yarn.api.records.impl.pb.ContainerLaunchContextPBImpl.addApplicationACLs(ContainerLaunchContextPBImpl.java:446)
        at 
org.apache.hadoop.yarn.api.records.impl.pb.ContainerLaunchContextPBImpl.mergeLocalToBuilder(ContainerLaunchContextPBImpl.java:121)
        at 
org.apache.hadoop.yarn.api.records.impl.pb.ContainerLaunchContextPBImpl.mergeLocalToProto(ContainerLaunchContextPBImpl.java:128)
        at 
org.apache.hadoop.yarn.api.records.impl.pb.ContainerLaunchContextPBImpl.getProto(ContainerLaunchContextPBImpl.java:70)
        at 
org.apache.hadoop.yarn.api.protocolrecords.impl.pb.StartContainerRequestPBImpl.convertToProtoFormat(StartContainerRequestPBImpl.java:156)
        at 
org.apache.hadoop.yarn.api.protocolrecords.impl.pb.StartContainerRequestPBImpl.mergeLocalToBuilder(StartContainerRequestPBImpl.java:85)
        at 
org.apache.hadoop.yarn.api.protocolrecords.impl.pb.StartContainerRequestPBImpl.mergeLocalToProto(StartContainerRequestPBImpl.java:95)
        at 
org.apache.hadoop.yarn.api.protocolrecords.impl.pb.StartContainerRequestPBImpl.getProto(StartContainerRequestPBImpl.java:57)
        at 
org.apache.hadoop.yarn.api.protocolrecords.impl.pb.StartContainersRequestPBImpl.convertToProtoFormat(StartContainersRequestPBImpl.java:137)
        at 
org.apache.hadoop.yarn.api.protocolrecords.impl.pb.StartContainersRequestPBImpl.addLocalRequestsToProto(StartContainersRequestPBImpl.java:97)
        at 
org.apache.hadoop.yarn.api.protocolrecords.impl.pb.StartContainersRequestPBImpl.mergeLocalToBuilder(StartContainersRequestPBImpl.java:79)
        at 
org.apache.hadoop.yarn.api.protocolrecords.impl.pb.StartContainersRequestPBImpl.mergeLocalToProto(StartContainersRequestPBImpl.java:72)
        at 
org.apache.hadoop.yarn.api.protocolrecords.impl.pb.StartContainersRequestPBImpl.getProto(StartContainersRequestPBImpl.java:48)
        at 
org.apache.hadoop.yarn.api.impl.pb.client.ContainerManagementProtocolPBClientImpl.startContainers(ContainerManagementProtocolPBClientImpl.java:93)
        at 
org.apache.hadoop.yarn.server.resourcemanager.amlauncher.AMLauncher.launch(AMLauncher.java:119)
        at 
org.apache.hadoop.yarn.server.resourcemanager.amlauncher.AMLauncher.run(AMLauncher.java:254)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:745)

2017-09-08 02:34:37,968 ERROR 
org.apache.hadoop.yarn.server.resourcemanager.recovery.RMStateStore: Error 
updating app: application_1504809243340_0001
java.lang.NullPointerException
        at 
com.google.protobuf.CodedOutputStream.computeMessageSizeNoTag(CodedOutputStream.java:749)
        at 
com.google.protobuf.CodedOutputStream.computeMessageSize(CodedOutputStream.java:530)
        at 
org.apache.hadoop.yarn.proto.YarnProtos$ContainerLaunchContextProto.getSerializedSize(YarnProtos.java:38512)
        at 
com.google.protobuf.CodedOutputStream.computeMessageSizeNoTag(CodedOutputStream.java:749)
        at 
com.google.protobuf.CodedOutputStream.computeMessageSize(CodedOutputStream.java:530)
        at 
org.apache.hadoop.yarn.proto.YarnProtos$ApplicationSubmissionContextProto.getSerializedSize(YarnProtos.java:28481)
        at 
com.google.protobuf.CodedOutputStream.computeMessageSizeNoTag(CodedOutputStream.java:749)
        at 
com.google.protobuf.CodedOutputStream.computeMessageSize(CodedOutputStream.java:530)
        at 
org.apache.hadoop.yarn.proto.YarnServerResourceManagerRecoveryProtos$ApplicationStateDataProto.getSerializedSize(YarnServerResourceManagerRecoveryProtos.java:816)
        at 
com.google.protobuf.AbstractMessageLite.toByteArray(AbstractMessageLite.java:62)
        at 
org.apache.hadoop.yarn.server.resourcemanager.recovery.FileSystemRMStateStore.updateApplicationStateInternal(FileSystemRMStateStore.java:426)
        at 
org.apache.hadoop.yarn.server.resourcemanager.recovery.RMStateStore$UpdateAppTransition.transition(RMStateStore.java:163)
        at 
org.apache.hadoop.yarn.server.resourcemanager.recovery.RMStateStore$UpdateAppTransition.transition(RMStateStore.java:148)
        at 
org.apache.hadoop.yarn.state.StateMachineFactory$SingleInternalArc.doTransition(StateMachineFactory.java:362)
        at 
org.apache.hadoop.yarn.state.StateMachineFactory.doTransition(StateMachineFactory.java:302)
        at 
org.apache.hadoop.yarn.state.StateMachineFactory.access$300(StateMachineFactory.java:46)
        at 
org.apache.hadoop.yarn.state.StateMachineFactory$InternalStateMachine.doTransition(StateMachineFactory.java:448)
        at 
org.apache.hadoop.yarn.server.resourcemanager.recovery.RMStateStore.handleStoreEvent(RMStateStore.java:810)
        at 
org.apache.hadoop.yarn.server.resourcemanager.recovery.RMStateStore$ForwardingEventHandler.handle(RMStateStore.java:864)
        at 
org.apache.hadoop.yarn.server.resourcemanager.recovery.RMStateStore$ForwardingEventHandler.handle(RMStateStore.java:859)
        at 
org.apache.hadoop.yarn.event.AsyncDispatcher.dispatch(AsyncDispatcher.java:173)
        at 
org.apache.hadoop.yarn.event.AsyncDispatcher$1.run(AsyncDispatcher.java:106)
        at java.lang.Thread.run(Thread.java:745)
2017-09-08 02:34:37,978 FATAL 
org.apache.hadoop.yarn.server.resourcemanager.ResourceManager: Received a 
org.apache.hadoop.yarn.server.resourcemanager.RMFatalEvent of type 
STATE_STORE_OP_FAILED. Cause:
java.lang.NullPointerException
        at 
com.google.protobuf.CodedOutputStream.computeMessageSizeNoTag(CodedOutputStream.java:749)
        at 
com.google.protobuf.CodedOutputStream.computeMessageSize(CodedOutputStream.java:530)
        at 
org.apache.hadoop.yarn.proto.YarnProtos$ContainerLaunchContextProto.getSerializedSize(YarnProtos.java:38512)
        at 
com.google.protobuf.CodedOutputStream.computeMessageSizeNoTag(CodedOutputStream.java:749)
        at 
com.google.protobuf.CodedOutputStream.computeMessageSize(CodedOutputStream.java:530)
        at 
org.apache.hadoop.yarn.proto.YarnProtos$ApplicationSubmissionContextProto.getSerializedSize(YarnProtos.java:28481)
        at 
com.google.protobuf.CodedOutputStream.computeMessageSizeNoTag(CodedOutputStream.java:749)
        at 
com.google.protobuf.CodedOutputStream.computeMessageSize(CodedOutputStream.java:530)
        at 
org.apache.hadoop.yarn.proto.YarnServerResourceManagerRecoveryProtos$ApplicationStateDataProto.getSerializedSize(YarnServerResourceManagerRecoveryProtos.java:816)
        at 
com.google.protobuf.AbstractMessageLite.toByteArray(AbstractMessageLite.java:62)
        at 
org.apache.hadoop.yarn.server.resourcemanager.recovery.FileSystemRMStateStore.updateApplicationStateInternal(FileSystemRMStateStore.java:426)
        at 
org.apache.hadoop.yarn.server.resourcemanager.recovery.RMStateStore$UpdateAppTransition.transition(RMStateStore.java:163)
        at 
org.apache.hadoop.yarn.server.resourcemanager.recovery.RMStateStore$UpdateAppTransition.transition(RMStateStore.java:148)
        at 
org.apache.hadoop.yarn.state.StateMachineFactory$SingleInternalArc.doTransition(StateMachineFactory.java:362)
        at 
org.apache.hadoop.yarn.state.StateMachineFactory.doTransition(StateMachineFactory.java:302)
        at 
org.apache.hadoop.yarn.state.StateMachineFactory.access$300(StateMachineFactory.java:46)
        at 
org.apache.hadoop.yarn.state.StateMachineFactory$InternalStateMachine.doTransition(StateMachineFactory.java:448)
        at 
org.apache.hadoop.yarn.server.resourcemanager.recovery.RMStateStore.handleStoreEvent(RMStateStore.java:810)
        at 
org.apache.hadoop.yarn.server.resourcemanager.recovery.RMStateStore$ForwardingEventHandler.handle(RMStateStore.java:864)
        at 
org.apache.hadoop.yarn.server.resourcemanager.recovery.RMStateStore$ForwardingEventHandler.handle(RMStateStore.java:859)
        at 
org.apache.hadoop.yarn.event.AsyncDispatcher.dispatch(AsyncDispatcher.java:173)
        at 
org.apache.hadoop.yarn.event.AsyncDispatcher$1.run(AsyncDispatcher.java:106)
        at java.lang.Thread.run(Thread.java:745)

2017-09-08 02:34:37,987 INFO 
org.apache.hadoop.yarn.server.resourcemanager.rmcontainer.RMContainerImpl: 
container_1504809243340_0001_01_000001 Container Transitioned from ACQUIRED to 
KILLED
2017-09-08 02:34:37,987 INFO 
org.apache.hadoop.yarn.server.resourcemanager.scheduler.common.fica.FiCaSchedulerApp:
 Completed container: container_1504809243340_0001_01_000001 in state: KILLED 
event:KILL
2017-09-08 02:34:37,987 INFO 
org.apache.hadoop.yarn.server.resourcemanager.RMAuditLogger: USER=hires    
OPERATION=AM Released Container TARGET=SchedulerApp     RESULT=SUCCESS  
APPID=application_1504809243340_0001    
CONTAINERID=container_1504809243340_0001_01_000001
2017-09-08 02:34:37,988 INFO 
org.apache.hadoop.yarn.server.resourcemanager.scheduler.SchedulerNode: Released 
container container_1504809243340_0001_01_000001 of capacity <memory:2048, 
vCores:1> on host hadoop11:45454, which currently has 0 containers, <memory:0, 
vCores:0> used and <memory:8096, vCores:8> available, release resources=true
2017-09-08 02:34:37,988 INFO org.apache.hadoop.util.ExitUtil: Exiting with 
status 1
2017-09-08 02:34:37,988 INFO 
org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.LeafQueue: 
default used=<memory:0, vCores:0> numContainers=0 user=hires 
user-resources=<memory:0, vCores:0>
2017-09-08 02:34:37,989 INFO 
org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.LeafQueue: 
completedContainer container=Container: [ContainerId: 
container_1504809243340_0001_01_000001, NodeId: hadoop11:45454, 
NodeHttpAddress: hadoop11:8042, Resource: <memory:2048, vCores:1>, Priority: 0, 
Token: Token { kind: ContainerToken, service: 10.3.1.11:45454 }, ] 
queue=default: capacity=1.0, absoluteCapacity=1.0, usedResources=<memory:0, 
vCores:0>, usedCapacity=0.0, absoluteUsedCapacity=0.0, numApps=1, 
numContainers=0 cluster=<memory:16192, vCores:16>
2017-09-08 02:34:37,989 INFO 
org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.ParentQueue: 
completedContainer queue=root usedCapacity=0.0 absoluteUsedCapacity=0.0 
used=<memory:0, vCores:0> cluster=<memory:16192, vCores:16>
2017-09-08 02:34:37,990 INFO 
org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.ParentQueue: 
Re-sorting completed queue: root.default stats: default: capacity=1.0, 
absoluteCapacity=1.0, usedResources=<memory:0, vCores:0>, usedCapacity=0.0, 
absoluteUsedCapacity=0.0, numApps=1, numContainers=0
2017-09-08 02:34:37,990 INFO 
org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacityScheduler:
 Application attempt appattempt_1504809243340_0001_000001 released container 
container_1504809243340_0001_01_000001 on node: host: hadoop11:45454 
#containers=0 available=8096 used=0 with event: KILL
2017-09-08 02:34:37,990 INFO 
org.apache.hadoop.yarn.server.resourcemanager.scheduler.AppSchedulingInfo: 
Application application_1504809243340_0001 requests cleared
2017-09-08 02:34:37,990 INFO 
org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.LeafQueue: 
Application removed - appId: application_1504809243340_0001 user: hires queue: 
default #user-pending-applications: 0 #user-active-applications: 0 
#queue-pending-applications: 0 #queue-active-applications: 0
2017-09-08 02:34:38,001 ERROR 
org.apache.hadoop.security.token.delegation.AbstractDelegationTokenSecretManager:
 ExpiredTokenRemover received java.lang.InterruptedException: sleep interrupted
2017-09-08 02:34:38,005 INFO org.mortbay.log: Stopped 
HttpServer2$SelectChannelConnectorWithSafeStartup@hadoop11:8088
2017-09-08 02:34:38,005 ERROR 
org.apache.hadoop.security.token.delegation.AbstractDelegationTokenSecretManager:
 ExpiredTokenRemover received java.lang.InterruptedException: sleep interrupted
2017-09-08 02:34:38,006 ERROR 
org.apache.hadoop.security.token.delegation.AbstractDelegationTokenSecretManager:
 ExpiredTokenRemover received java.lang.InterruptedException: sleep interrupted
2017-09-08 02:34:38,108 INFO org.apache.hadoop.ipc.Server: Stopping server on 
8032
2017-09-08 02:34:38,113 INFO org.apache.hadoop.ipc.Server: Stopping IPC Server 
listener on 8032
2017-09-08 02:34:38,113 INFO org.apache.hadoop.ipc.Server: Stopping server on 
8033
2017-09-08 02:34:38,114 INFO org.apache.hadoop.ipc.Server: Stopping IPC Server 
Responder
2017-09-08 02:34:38,114 INFO org.apache.hadoop.ipc.Server: Stopping IPC Server 
listener on 8033
2017-09-08 02:34:38,114 INFO org.apache.hadoop.ipc.Server: Stopping IPC Server 
Responder
{code}


> Similar to YARN-2387:Resource Manager crashes with NPE due to lack of 
> synchronization
> -------------------------------------------------------------------------------------
>
>                 Key: YARN-7176
>                 URL: https://issues.apache.org/jira/browse/YARN-7176
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: RM
>    Affects Versions: 2.6.0
>            Reporter: lujie
>            Assignee: lujie
>            Priority: Blocker
>         Attachments: YARN-7176.patch, logs.rar
>
>
> submit a job, when the job is starting Appmaster Containers(eg. 
> startContainers) , then send kill command.  After RM receive kill command, it 
> will perform state store(eg.updateApplicationStateInternal).
> the startContainers  process and updateApplicationStateInternal will call the 
> same method  ContainerLaunchContextPBImpl.getProto which lack of the 
> synchronization(also can be called in reInitializeContainer method), the RM 
> log will show below. 
> {code:java}
> 2017-09-08 02:34:37,967 INFO 
> org.apache.hadoop.yarn.server.resourcemanager.amlauncher.AMLauncher: Error 
> launching appattempt_1504809243340_0001_000001. Got exception: 
> java.lang.ArrayIndexOutOfBoundsException: 3
>       at java.util.ArrayList.add(ArrayList.java:441)
>       at 
> com.google.protobuf.AbstractMessageLite$Builder.addAll(AbstractMessageLite.java:330)
>       at 
> org.apache.hadoop.yarn.proto.YarnProtos$ContainerLaunchContextProto$Builder.addAllApplicationACLs(YarnProtos.java:39956)
>       at 
> org.apache.hadoop.yarn.api.records.impl.pb.ContainerLaunchContextPBImpl.addApplicationACLs(ContainerLaunchContextPBImpl.java:446)
>       at 
> org.apache.hadoop.yarn.api.records.impl.pb.ContainerLaunchContextPBImpl.mergeLocalToBuilder(ContainerLaunchContextPBImpl.java:121)
>       at 
> org.apache.hadoop.yarn.api.records.impl.pb.ContainerLaunchContextPBImpl.mergeLocalToProto(ContainerLaunchContextPBImpl.java:128)
>       at 
> org.apache.hadoop.yarn.api.records.impl.pb.ContainerLaunchContextPBImpl.getProto(ContainerLaunchContextPBImpl.java:70)
>       at 
> org.apache.hadoop.yarn.api.protocolrecords.impl.pb.StartContainerRequestPBImpl.convertToProtoFormat(StartContainerRequestPBImpl.java:156)
>       at 
> org.apache.hadoop.yarn.api.protocolrecords.impl.pb.StartContainerRequestPBImpl.mergeLocalToBuilder(StartContainerRequestPBImpl.java:85)
>       at 
> org.apache.hadoop.yarn.api.protocolrecords.impl.pb.StartContainerRequestPBImpl.mergeLocalToProto(StartContainerRequestPBImpl.java:95)
>       at 
> org.apache.hadoop.yarn.api.protocolrecords.impl.pb.StartContainerRequestPBImpl.getProto(StartContainerRequestPBImpl.java:57)
>       at 
> org.apache.hadoop.yarn.api.protocolrecords.impl.pb.StartContainersRequestPBImpl.convertToProtoFormat(StartContainersRequestPBImpl.java:137)
>       at 
> org.apache.hadoop.yarn.api.protocolrecords.impl.pb.StartContainersRequestPBImpl.addLocalRequestsToProto(StartContainersRequestPBImpl.java:97)
>       at 
> org.apache.hadoop.yarn.api.protocolrecords.impl.pb.StartContainersRequestPBImpl.mergeLocalToBuilder(StartContainersRequestPBImpl.java:79)
>       at 
> org.apache.hadoop.yarn.api.protocolrecords.impl.pb.StartContainersRequestPBImpl.mergeLocalToProto(StartContainersRequestPBImpl.java:72)
>       at 
> org.apache.hadoop.yarn.api.protocolrecords.impl.pb.StartContainersRequestPBImpl.getProto(StartContainersRequestPBImpl.java:48)
>       at 
> org.apache.hadoop.yarn.api.impl.pb.client.ContainerManagementProtocolPBClientImpl.startContainers(ContainerManagementProtocolPBClientImpl.java:93)
>       at 
> org.apache.hadoop.yarn.server.resourcemanager.amlauncher.AMLauncher.launch(AMLauncher.java:119)
>       at 
> org.apache.hadoop.yarn.server.resourcemanager.amlauncher.AMLauncher.run(AMLauncher.java:254)
>       at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
>       at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
>       at java.lang.Thread.run(Thread.java:745)
> 2017-09-08 02:34:37,968 ERROR 
> org.apache.hadoop.yarn.server.resourcemanager.recovery.RMStateStore: Error 
> updating app: application_1504809243340_0001
> java.lang.NullPointerException
>       at 
> com.google.protobuf.CodedOutputStream.computeMessageSizeNoTag(CodedOutputStream.java:749)
>       at 
> com.google.protobuf.CodedOutputStream.computeMessageSize(CodedOutputStream.java:530)
>       at 
> org.apache.hadoop.yarn.proto.YarnProtos$ContainerLaunchContextProto.getSerializedSize(YarnProtos.java:38512)
>       at 
> com.google.protobuf.CodedOutputStream.computeMessageSizeNoTag(CodedOutputStream.java:749)
>       at 
> com.google.protobuf.CodedOutputStream.computeMessageSize(CodedOutputStream.java:530)
>       at 
> org.apache.hadoop.yarn.proto.YarnProtos$ApplicationSubmissionContextProto.getSerializedSize(YarnProtos.java:28481)
>       at 
> com.google.protobuf.CodedOutputStream.computeMessageSizeNoTag(CodedOutputStream.java:749)
>       at 
> com.google.protobuf.CodedOutputStream.computeMessageSize(CodedOutputStream.java:530)
>       at 
> org.apache.hadoop.yarn.proto.YarnServerResourceManagerRecoveryProtos$ApplicationStateDataProto.getSerializedSize(YarnServerResourceManagerRecoveryProtos.java:816)
>       at 
> com.google.protobuf.AbstractMessageLite.toByteArray(AbstractMessageLite.java:62)
>       at 
> org.apache.hadoop.yarn.server.resourcemanager.recovery.FileSystemRMStateStore.updateApplicationStateInternal(FileSystemRMStateStore.java:426)
>       at 
> org.apache.hadoop.yarn.server.resourcemanager.recovery.RMStateStore$UpdateAppTransition.transition(RMStateStore.java:163)
>       at 
> org.apache.hadoop.yarn.server.resourcemanager.recovery.RMStateStore$UpdateAppTransition.transition(RMStateStore.java:148)
>       at 
> org.apache.hadoop.yarn.state.StateMachineFactory$SingleInternalArc.doTransition(StateMachineFactory.java:362)
>       at 
> org.apache.hadoop.yarn.state.StateMachineFactory.doTransition(StateMachineFactory.java:302)
>       at 
> org.apache.hadoop.yarn.state.StateMachineFactory.access$300(StateMachineFactory.java:46)
>       at 
> org.apache.hadoop.yarn.state.StateMachineFactory$InternalStateMachine.doTransition(StateMachineFactory.java:448)
>       at 
> org.apache.hadoop.yarn.server.resourcemanager.recovery.RMStateStore.handleStoreEvent(RMStateStore.java:810)
>       at 
> org.apache.hadoop.yarn.server.resourcemanager.recovery.RMStateStore$ForwardingEventHandler.handle(RMStateStore.java:864)
>       at 
> org.apache.hadoop.yarn.server.resourcemanager.recovery.RMStateStore$ForwardingEventHandler.handle(RMStateStore.java:859)
>       at 
> org.apache.hadoop.yarn.event.AsyncDispatcher.dispatch(AsyncDispatcher.java:173)
>       at 
> org.apache.hadoop.yarn.event.AsyncDispatcher$1.run(AsyncDispatcher.java:106)
>       at java.lang.Thread.run(Thread.java:745)
> 2017-09-08 02:34:37,978 FATAL 
> org.apache.hadoop.yarn.server.resourcemanager.ResourceManager: Received a 
> org.apache.hadoop.yarn.server.resourcemanager.RMFatalEvent of type 
> STATE_STORE_OP_FAILED. Cause:
> java.lang.NullPointerException
>       at 
> com.google.protobuf.CodedOutputStream.computeMessageSizeNoTag(CodedOutputStream.java:749)
>       at 
> com.google.protobuf.CodedOutputStream.computeMessageSize(CodedOutputStream.java:530)
>       at 
> org.apache.hadoop.yarn.proto.YarnProtos$ContainerLaunchContextProto.getSerializedSize(YarnProtos.java:38512)
>       at 
> com.google.protobuf.CodedOutputStream.computeMessageSizeNoTag(CodedOutputStream.java:749)
>       at 
> com.google.protobuf.CodedOutputStream.computeMessageSize(CodedOutputStream.java:530)
>       at 
> org.apache.hadoop.yarn.proto.YarnProtos$ApplicationSubmissionContextProto.getSerializedSize(YarnProtos.java:28481)
>       at 
> com.google.protobuf.CodedOutputStream.computeMessageSizeNoTag(CodedOutputStream.java:749)
>       at 
> com.google.protobuf.CodedOutputStream.computeMessageSize(CodedOutputStream.java:530)
>       at 
> org.apache.hadoop.yarn.proto.YarnServerResourceManagerRecoveryProtos$ApplicationStateDataProto.getSerializedSize(YarnServerResourceManagerRecoveryProtos.java:816)
>       at 
> com.google.protobuf.AbstractMessageLite.toByteArray(AbstractMessageLite.java:62)
>       at 
> org.apache.hadoop.yarn.server.resourcemanager.recovery.FileSystemRMStateStore.updateApplicationStateInternal(FileSystemRMStateStore.java:426)
>       at 
> org.apache.hadoop.yarn.server.resourcemanager.recovery.RMStateStore$UpdateAppTransition.transition(RMStateStore.java:163)
>       at 
> org.apache.hadoop.yarn.server.resourcemanager.recovery.RMStateStore$UpdateAppTransition.transition(RMStateStore.java:148)
>       at 
> org.apache.hadoop.yarn.state.StateMachineFactory$SingleInternalArc.doTransition(StateMachineFactory.java:362)
>       at 
> org.apache.hadoop.yarn.state.StateMachineFactory.doTransition(StateMachineFactory.java:302)
>       at 
> org.apache.hadoop.yarn.state.StateMachineFactory.access$300(StateMachineFactory.java:46)
>       at 
> org.apache.hadoop.yarn.state.StateMachineFactory$InternalStateMachine.doTransition(StateMachineFactory.java:448)
>       at 
> org.apache.hadoop.yarn.server.resourcemanager.recovery.RMStateStore.handleStoreEvent(RMStateStore.java:810)
>       at 
> org.apache.hadoop.yarn.server.resourcemanager.recovery.RMStateStore$ForwardingEventHandler.handle(RMStateStore.java:864)
>       at 
> org.apache.hadoop.yarn.server.resourcemanager.recovery.RMStateStore$ForwardingEventHandler.handle(RMStateStore.java:859)
>       at 
> org.apache.hadoop.yarn.event.AsyncDispatcher.dispatch(AsyncDispatcher.java:173)
>       at 
> org.apache.hadoop.yarn.event.AsyncDispatcher$1.run(AsyncDispatcher.java:106)
>       at java.lang.Thread.run(Thread.java:745)
> 2017-09-08 02:34:37,987 INFO 
> org.apache.hadoop.yarn.server.resourcemanager.rmcontainer.RMContainerImpl: 
> container_1504809243340_0001_01_000001 Container Transitioned from ACQUIRED 
> to KILLED
> 2017-09-08 02:34:37,987 INFO 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.common.fica.FiCaSchedulerApp:
>  Completed container: container_1504809243340_0001_01_000001 in state: KILLED 
> event:KILL
> 2017-09-08 02:34:37,987 INFO 
> org.apache.hadoop.yarn.server.resourcemanager.RMAuditLogger: USER=hires  
> OPERATION=AM Released Container TARGET=SchedulerApp     RESULT=SUCCESS  
> APPID=application_1504809243340_0001    
> CONTAINERID=container_1504809243340_0001_01_000001
> 2017-09-08 02:34:37,988 INFO 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.SchedulerNode: 
> Released container container_1504809243340_0001_01_000001 of capacity 
> <memory:2048, vCores:1> on host hadoop11:45454, which currently has 0 
> containers, <memory:0, vCores:0> used and <memory:8096, vCores:8> available, 
> release resources=true
> 2017-09-08 02:34:37,988 INFO org.apache.hadoop.util.ExitUtil: Exiting with 
> status 1
> 2017-09-08 02:34:37,988 INFO 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.LeafQueue: 
> default used=<memory:0, vCores:0> numContainers=0 user=hires 
> user-resources=<memory:0, vCores:0>
> 2017-09-08 02:34:37,989 INFO 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.LeafQueue: 
> completedContainer container=Container: [ContainerId: 
> container_1504809243340_0001_01_000001, NodeId: hadoop11:45454, 
> NodeHttpAddress: hadoop11:8042, Resource: <memory:2048, vCores:1>, Priority: 
> 0, Token: Token { kind: ContainerToken, service: 10.3.1.11:45454 }, ] 
> queue=default: capacity=1.0, absoluteCapacity=1.0, usedResources=<memory:0, 
> vCores:0>, usedCapacity=0.0, absoluteUsedCapacity=0.0, numApps=1, 
> numContainers=0 cluster=<memory:16192, vCores:16>
> 2017-09-08 02:34:37,989 INFO 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.ParentQueue: 
> completedContainer queue=root usedCapacity=0.0 absoluteUsedCapacity=0.0 
> used=<memory:0, vCores:0> cluster=<memory:16192, vCores:16>
> 2017-09-08 02:34:37,990 INFO 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.ParentQueue: 
> Re-sorting completed queue: root.default stats: default: capacity=1.0, 
> absoluteCapacity=1.0, usedResources=<memory:0, vCores:0>, usedCapacity=0.0, 
> absoluteUsedCapacity=0.0, numApps=1, numContainers=0
> 2017-09-08 02:34:37,990 INFO 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacityScheduler:
>  Application attempt appattempt_1504809243340_0001_000001 released container 
> container_1504809243340_0001_01_000001 on node: host: hadoop11:45454 
> #containers=0 available=8096 used=0 with event: KILL
> 2017-09-08 02:34:37,990 INFO 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.AppSchedulingInfo: 
> Application application_1504809243340_0001 requests cleared
> 2017-09-08 02:34:37,990 INFO 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.LeafQueue: 
> Application removed - appId: application_1504809243340_0001 user: hires 
> queue: default #user-pending-applications: 0 #user-active-applications: 0 
> #queue-pending-applications: 0 #queue-active-applications: 0
> 2017-09-08 02:34:38,001 ERROR 
> org.apache.hadoop.security.token.delegation.AbstractDelegationTokenSecretManager:
>  ExpiredTokenRemover received java.lang.InterruptedException: sleep 
> interrupted
> 2017-09-08 02:34:38,005 INFO org.mortbay.log: Stopped 
> HttpServer2$SelectChannelConnectorWithSafeStartup@hadoop11:8088
> 2017-09-08 02:34:38,005 ERROR 
> org.apache.hadoop.security.token.delegation.AbstractDelegationTokenSecretManager:
>  ExpiredTokenRemover received java.lang.InterruptedException: sleep 
> interrupted
> 2017-09-08 02:34:38,006 ERROR 
> org.apache.hadoop.security.token.delegation.AbstractDelegationTokenSecretManager:
>  ExpiredTokenRemover received java.lang.InterruptedException: sleep 
> interrupted
> 2017-09-08 02:34:38,108 INFO org.apache.hadoop.ipc.Server: Stopping server on 
> 8032
> 2017-09-08 02:34:38,113 INFO org.apache.hadoop.ipc.Server: Stopping IPC 
> Server listener on 8032
> 2017-09-08 02:34:38,113 INFO org.apache.hadoop.ipc.Server: Stopping server on 
> 8033
> 2017-09-08 02:34:38,114 INFO org.apache.hadoop.ipc.Server: Stopping IPC 
> Server Responder
> 2017-09-08 02:34:38,114 INFO org.apache.hadoop.ipc.Server: Stopping IPC 
> Server listener on 8033
> 2017-09-08 02:34:38,114 INFO org.apache.hadoop.ipc.Server: Stopping IPC 
> Server Responder
> {code}



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