Kihwal Lee created HDFS-4495:
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Summary: Allow client-side lease renewal to be retried beyond
soft-limit
Key: HDFS-4495
URL: https://issues.apache.org/jira/browse/HDFS-4495
Project: Hadoop HDFS
Issue Type: Bug
Components: hdfs-client
Affects Versions: 0.23.5, 2.0.3-alpha
Reporter: Kihwal Lee
The current lease renewal code in DFSClient gives up after several retries, if
the soft limit exceeds. This causes the client to abort. Without this self
destruction behavior, lease renewal can be retried infinitely due to unrelated
low-level issue and prevent DFSClient and associated Connection from getting
garbage collected.
However, giving up at passage of the soft limit has been shown to be too
fragile; A long GC on namenode or transient network outage can make clients
fail. We need the self-destruct behavior, but clients should be allowed to
retry for longer period of time.
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