Haohui Mai created HDFS-6029:
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Summary: Secondary NN fails to checkpoint after -rollingUpgrade
prepare
Key: HDFS-6029
URL: https://issues.apache.org/jira/browse/HDFS-6029
Project: Hadoop HDFS
Issue Type: Sub-task
Reporter: Haohui Mai
Assignee: Jing Zhao
If Secondary NN crashes right after calling {{dfsadmin -rollingUpgrade
prepare}}, it fails to checkpoint because it fails to download the newest
fsimage whose name is {{fsimage_rollback_txid}}.
To reproduce this bug:
# Run NN and SNN.
# Run {{dfsadmin -rollingUpgrade prepare}}.
# Shutdown SNN, clear all fsimage created by SNN.
# Restart SNN, SNN tries to download the {{fsimage_txid}} instead of
{{fsimage_rollback_txid}}, resulting the failure.
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