Nick Sawadsky created JGRP-2320:
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Summary: FILE_PING.findMembers() optimizations
Key: JGRP-2320
URL:
https://issues.jboss.org/browse/JGRP-2320
Project: JGroups
Issue Type: Enhancement
Affects Versions: 4.0.15, 3.6.16
Reporter: Nick Sawadsky
Assignee: Bela Ban
Following on from JGRP-2288, a couple of possible optimizations/improvements to
{{FILE_PING.findMembers()}} were identified.
1. After the initial call to {{readAll()}}, there are a number of steps taken that apply
only if the address of the local node was not returned from {{readAll()}}. However, in the
case where {{findMembers}} is invoked by {{TP.fetchResponsesFromDiscoveryProtocol()}}, it
would not be expected that the address of the local node is returned, since the responses
returned by readAll() are filtered based on the {{members}} parameter. To avoid
unnecessary writes to the file (which may be in a cloud store), it would be good to add
some checks based on whether {{members}} is null or not. For example, the calls to
{{write()}} and {{writeAll()}} should probably not occur unless {{members}} is null.
2. In the call to {{sendDiscoveryResponse()}}, the last parameter is always {{false}}.
However, it seems possible for a coordinator to get to this point in some edge cases.
Though I haven't been able to identify any clear bugs that this would lead to, it
might be better to pass {{is_coord}} as the last parameter.
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