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Type:
Sub-task
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Status: Resolved
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Priority:
Major
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Resolution: Fixed
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Affects Version/s: None
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Fix Version/s: HDFS-5535 (Rolling upgrades)
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Component/s: namenode
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Labels:None
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Hadoop Flags:Reviewed
- When starting rolling upgrade, NN should create a checkpoint before it writes the upgrade marker edit log transaction.
- When rolling upgrade is in progress, NN should reject saveNamespace rpc calls. Further, if NN restarts, it should create a checkpoint only right before the upgrade marker.