Stefan Egli created SLING-3434:
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Summary: Make intra-cluster discovery-heartbeats independent from
machine clock differences
Key: SLING-3434
URL: https://issues.apache.org/jira/browse/SLING-3434
Project: Sling
Issue Type: Bug
Components: Extensions
Affects Versions: Discovery Impl 1.0.2
Reporter: Stefan Egli
SLING-2967 fixed an issue where topology connectors were dependent on having
machine clocks in sync - so inter-cluster we're no longer dependent on
NTP-synching.
Inside a cluster though, this problem is still there. Since heartbeats are
written as absolute time - based on the originator's machine clock - it still
only works fine the whole cluster is NTP-synched.
In general I think this is not a problem as it is best-practice to make sure
machines have NTP set up.
Nevertheless, it would help if discovery.impl could become independent from
this.
Also, if clocks are off by too much, pseudo-network-partitions can occur, with
the result of having multiple leaders in a cluster (also see SLING-3432)
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