Brahma Reddy Battula created HDFS-10244:
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Summary: Avoid accumulation of IBRs for SNN when the standby is
down for more than expected time
Key: HDFS-10244
URL: https://issues.apache.org/jira/browse/HDFS-10244
Project: Hadoop HDFS
Issue Type: Bug
Reporter: Brahma Reddy Battula
Assignee: Brahma Reddy Battula
As per discussion in HDFS-9917 and
[comment|https://issues.apache.org/jira/browse/HDFS-9917?focusedCommentId=15213947&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-15213947]
from [~vinayrpet]
Avoid accumulation of IBRs when the standby is down for long time, can we
consider as below.
1. IBRs for StandbyNN can have a threshold ( say 100K or 1Million IBRs ).
2. Also not to loose any important IBRs, IBRs can be cleared when "the
threshold is reached AND 'lastIBR' is more than 'heartbeatExpiryInterval'. i.e.
DataNode is considered dead in Namenode side". In that case, for sure
re-Register() will be called on reconnection to running NameNode (if any).
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