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https://issues.apache.org/jira/browse/IGNITE-6827?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16422805#comment-16422805
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Andrey Gura commented on IGNITE-6827:
-------------------------------------
[~ascherbakov] I've reviewed changes and have some comments.
First of all, it seems strange that {{rollbackOnTopologyChangeTimeout}}
parameter is part of {{TransactionConfiguration}}. Actually PME uses this value
and it is PME's responsibility to rollback transactions, so timeout should be
parameter of exchange.
{{GridDistributedTxFinishRequest}} contains new field {{timedout}}. I believe
that we can use bit from {{flags}} field instead of new boolean field. In this
case message format will n't be changed.
Some minor comments:
* Some TODO's added but isn't resolved in classes: {{IgniteTxManager}},
{{GridCacheAdapter}}, {{GridCAcheMvccManager}}.
* {{IgniteTxAdapter.remainingTime}}: {{timedOut}} flag value checking is
redundant because the same work will be done in couple lines below.
* {{GridCachePartitionExchangeManager.body0()}}: two calls of
{{cfg.getTransactionConfiguration().getRollbackOnTopologyChangeTimeout()}} can
be rewritten in more concise and convenient form:
Before:
{code:java}
boolean rollbackEnabled =
cfg.getTransactionConfiguration().getRollbackOnTopologyChangeTimeout() > 0;
final long dumpTimeout = 2 *
cctx.gridConfig().getNetworkTimeout();
long nextDumpTime = 0;
while (true) {
try {
resVer = exchFut.get(rollbackEnabled ?
cfg.getTransactionConfiguration().
getRollbackOnTopologyChangeTimeout() :
dumpTimeout, TimeUnit.MILLISECONDS);
break;
}
{code}
After:
{code:java}
long rollbackTimeout =
cfg.getTransactionConfiguration().getRollbackOnTopologyChangeTimeout();
final long dumpTimeout = 2 *
cctx.gridConfig().getNetworkTimeout();
long nextDumpTime = 0;
while (true) {
try {
resVer = exchFut.get(rollbackTimeout > 0 ?
rollbackTimeout : dumpTimeout, TimeUnit.MILLISECONDS);
break;
}
{code}
> Configurable rollback for long running transactions before partition exchange
> -----------------------------------------------------------------------------
>
> Key: IGNITE-6827
> URL: https://issues.apache.org/jira/browse/IGNITE-6827
> Project: Ignite
> Issue Type: Improvement
> Affects Versions: 2.0
> Reporter: Alexei Scherbakov
> Assignee: Alexei Scherbakov
> Priority: Major
> Fix For: 2.5
>
>
> Currently long running / buggy user transactions force partition exchange
> block on waiting for
> org.apache.ignite.internal.processors.cache.GridCacheSharedContext#partitionReleaseFuture,
> preventing all grid progress.
> I suggest introducing new global flag in TransactionConfiguration, like
> {{txRollbackTimeoutOnTopologyChange}}
> which will rollback exchange blocking transaction after the timeout.
> Still need to think what to do with other topology locking activities.
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