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HDDS-1370. Command Execution in Datanode fails because of NPE (#715)

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Bharat Viswanadham 2019-04-10 10:25:28 -07:00 committed by GitHub
parent dfb518bbf5
commit 0e770a6539
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2 changed files with 28 additions and 13 deletions
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30
hadoop-hdds/container-service/src/main/java/org/apache/hadoop/ozone/container/common/statemachine/StateContext.java
View File

@ -348,20 +348,26 @@ public class StateContext {
throws InterruptedException, ExecutionException, TimeoutException { throws InterruptedException, ExecutionException, TimeoutException {
stateExecutionCount.incrementAndGet(); stateExecutionCount.incrementAndGet();
DatanodeState<DatanodeStateMachine.DatanodeStates> task = getTask(); DatanodeState<DatanodeStateMachine.DatanodeStates> task = getTask();
if (this.isEntering()) {
task.onEnter(); // Adding not null check, in a case where datanode is still starting up, but
} // we called stop DatanodeStateMachine, this sets state to SHUTDOWN, and
task.execute(service); // there is a chance of getting task as null.
DatanodeStateMachine.DatanodeStates newState = task.await(time, unit); if (task != null) {
if (this.state != newState) { if (this.isEntering()) {
if (LOG.isDebugEnabled()) { task.onEnter();
LOG.debug("Task {} executed, state transited from {} to {}",
task.getClass().getSimpleName(), this.state, newState);
} }
if (isExiting(newState)) { task.execute(service);
task.onExit(); DatanodeStateMachine.DatanodeStates newState = task.await(time, unit);
if (this.state != newState) {
if (LOG.isDebugEnabled()) {
LOG.debug("Task {} executed, state transited from {} to {}",
task.getClass().getSimpleName(), this.state, newState);
}
if (isExiting(newState)) {
task.onExit();
}
this.setState(newState);
} }
this.setState(newState);
} }
} }

11
hadoop-hdds/container-service/src/main/java/org/apache/hadoop/ozone/container/common/states/datanode/RunningDatanodeState.java
View File

@ -86,7 +86,16 @@ public class RunningDatanodeState implements DatanodeState {
for (EndpointStateMachine endpoint : connectionManager.getValues()) { for (EndpointStateMachine endpoint : connectionManager.getValues()) {
Callable<EndpointStateMachine.EndPointStates> endpointTask Callable<EndpointStateMachine.EndPointStates> endpointTask
= getEndPointTask(endpoint); = getEndPointTask(endpoint);
ecs.submit(endpointTask); if (endpointTask != null) {
ecs.submit(endpointTask);
} else {
// This can happen if a task is taking more time than the timeOut
// specified for the task in await, and when it is completed the task
// has set the state to Shutdown, we may see the state as shutdown
// here. So, we need to Shutdown DatanodeStateMachine.
LOG.error("State is Shutdown in RunningDatanodeState");
context.setState(DatanodeStateMachine.DatanodeStates.SHUTDOWN);
}
} }
} }
//TODO : Cache some of these tasks instead of creating them //TODO : Cache some of these tasks instead of creating them