Pavel Kovalenko created IGNITE-8459:
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Summary: Searching checkpoint history for WAL rebalance is broken
Key: IGNITE-8459
URL: https://issues.apache.org/jira/browse/IGNITE-8459
Project: Ignite
Issue Type: Bug
Components: cache
Affects Versions: 2.5
Reporter: Pavel Kovalenko
Assignee: Pavel Kovalenko
Currently the mechanism to search available checkpoint records in WAL to have
history for WAL rebalance is broken. It means that WAL (Historical) rebalance
will never find history for rebalance and full rebalance will be always used.
This mechanism was broken in
https://github.com/apache/ignite/commit/ec04cd174ed5476fba83e8682214390736321b37
by unclear reasons.
If we swap the following two code blocks (database().beforeExchange() and
exchCtx if block):
{noformat}
/* It is necessary to run database callback before all topology
callbacks.
In case of persistent store is enabled we first restore partitions
presented on disk.
We need to guarantee that there are no partition state changes
logged to WAL before this callback
to make sure that we correctly restored last actual states. */
cctx.database().beforeExchange(this);
if (!exchCtx.mergeExchanges()) {
for (CacheGroupContext grp : cctx.cache().cacheGroups()) {
if (grp.isLocal() || cacheGroupStopping(grp.groupId()))
continue;
// It is possible affinity is not initialized yet if node joins
to cluster.
if (grp.affinity().lastVersion().topologyVersion() > 0)
grp.topology().beforeExchange(this, !centralizedAff &&
!forceAffReassignment, false);
}
}
{noformat}
the searching mechanism will start to work correctly. Currently it's unclear
why it's happened.
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