Lei Yang created HDFS-17290:
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Summary: HDFS: add client rpc backoff metrics due to throttling
from lowest priority queue
Key: HDFS-17290
URL: https://issues.apache.org/jira/browse/HDFS-17290
Project: Hadoop HDFS
Issue Type: Bug
Affects Versions: 3.3.6, 2.10.0
Reporter: Lei Yang
Assignee: Lei Yang
Clients are backoff when rpcs cannot be enqueued. However there are cases when
this could happen. Example assumes prio
# Client are directly enqueued into lowest priority queue and backoff when
lowest queue is full. Client are expected to disconnect from namenode.
# Client are enqueued into non-lowest priority queue and overflowed all the
way down to lowest priority queue and back off. In this case, connection
between client and namenode remains open.
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