Package org.apache.storm.nimbus
Class TimeOutWorkerHeartbeatsRecoveryStrategy
java.lang.Object
org.apache.storm.nimbus.TimeOutWorkerHeartbeatsRecoveryStrategy
- All Implemented Interfaces:
IWorkerHeartbeatsRecoveryStrategy
public class TimeOutWorkerHeartbeatsRecoveryStrategy
extends Object
implements IWorkerHeartbeatsRecoveryStrategy
Wait for a node to report worker heartbeats until a configured timeout. For cases below we have strategies:
1: When nimbus gains leader ship, it will decide if the heartbeats are ready based on the reported node ids, supervisors/nodes will take care of the worker heartbeats recovery, a reported node id means all the workers heartbeats on the node are reported.
2: If several supervisor also crush and will never recover[or all crush for some unknown reason], workers will report their heartbeats directly to master, so it has not any effect.
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Constructor Summary
Constructors -
Method Summary
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Constructor Details
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TimeOutWorkerHeartbeatsRecoveryStrategy
public TimeOutWorkerHeartbeatsRecoveryStrategy()
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Method Details
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prepare
Description copied from interface:IWorkerHeartbeatsRecoveryStrategyFunction to prepare the strategy.- Specified by:
preparein interfaceIWorkerHeartbeatsRecoveryStrategy- Parameters:
conf- config
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isReady
Description copied from interface:IWorkerHeartbeatsRecoveryStrategyFunction to decide if the heartbeats is ready.- Specified by:
isReadyin interfaceIWorkerHeartbeatsRecoveryStrategy- Parameters:
nodeIds- all the node ids from current physical plan[assignments], read fromClusterState- Returns:
- true if all node worker heartbeats reported
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reportNodeId
Description copied from interface:IWorkerHeartbeatsRecoveryStrategyreport the node id to this strategy to help to decideisReady.- Specified by:
reportNodeIdin interfaceIWorkerHeartbeatsRecoveryStrategy- Parameters:
nodeId- the node id from reported SupervisorWorkerHeartbeats
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