[infinispan-dev] [wildfly-dev] WFLYTX0013 in the Infinispan Openshift Template

Wed Apr 18 09:07:54 EDT 2018

Hey Tom,

Comments inlined.

Thanks,
Sebastian

On Tue, Apr 17, 2018 at 4:37 PM Tom Jenkinson <tom.jenkinson at redhat.com>
wrote:

>
>
> On 16 April 2018 at 09:31, <> wrote:
>
>> Adding +WildFly Dev <wildfly-dev at lists.jboss.org> to the loop
>
>
>>
>> Thanks for the explanation Rado.
>>
>> TL;DR: A while ago Sanne pointed out that we do not set `node-identifier`
>> in transaction subsystem by default. The default value for the
>> `node-identifier` attribute it `1`. Not setting this attribute might cause
>> problems in transaction recovery. Perhaps we could follow Rado's idea and
>> set it to node name by default?
>>
> Indeed - it would cause serious data integrity problems if a non-unique
> node-identifier is used.
>
>> Some more comments inlined.
>>
>> Thanks,
>> Sebastian
>>
>> On Fri, Apr 13, 2018 at 7:07 PM Radoslav Husar <rhusar at redhat.com>
>> wrote:
>>
>> > Hi Sebastian,
>> >
>> > On Wed, Apr 11, 2018 at 2:31 PM, Sebastian Laskawiec
>> > <slaskawi at redhat.com> wrote:
>> > > Hey Rado, Paul,
>> > >
>> > > I started looking into this issue and it turned out that WF subsystem
>> > > template doesn't provide `node-identifier` attribute [1].
>> >
>> > I assume you mean that the default WildFly server profiles do not
>>
> > explicitly define the attribute. Right ? thus the value defaults in
>
>
>> > the model to "1"
>> >
>> >
>> https://github.com/wildfly/wildfly/blob/master/transactions/src/main/java/org/jboss/as/txn/subsystem/TransactionSubsystemRootResourceDefinition.java#L97
>> > which sole intention seems to be to log a warning on boot if the value
>> > is unchanged.
>> > Why they decided on a constant that will be inherently not unique as
>> > opposed to defaulting to the node name (which we already require to be
>> > unique) as clustering node name or undertow instance-id does, is
>> > unclear to me.
>> > Some context is on https://issues.jboss.org/browse/WFLY-1119.
>> >
>>
>> In OpenShift environment we could set it to `hostname`. This is guaranteed
>> to be unique in whole OpenShift cluster.
>>
>>
>> We do this too in EAP images.
> To Rado's point, the default is "1" so we can print the warning to alert
> people they are misconfigured - it seems to be working :)
>

This is the point. From my understanding, if we set it to node name
(instead of "1"), we could make it always work correctly. We could even
remove the code that emits the warning (since the node name needs to be
unique).

To sum it up - if we decided to proceed this way, there would be no
requirement of setting the node-identifier at all.

>
>
>> >
>
>
>> > > I'm not sure if you guys are the right people to ask, but is it safe
>> to
>> > > leave it set to default? Or shall I override our Infinispan templates
>> and
>> > > add this parameter (as I mentioned before, in OpenShift this I wanted
>> to
>> > set
>> > > it as Pod name trimmed to the last 23 chars since this is the limit).
>>
> Putting a response to this in line - I am not certain who originally
> proposed this.
>
> You must use a globally unique node-identifier. If you are certain the
> last 23 characters guarantee that it would be valid - if there is a chance
> they are not unique it is not valid to trim.
>

If that's not an issue, again, we could use the same limit as we have for
node name.

>
>
>
>> >
>
>
>> > It is not safe to leave it set to "1" as that results in inconsistent
>> > processing of transaction recovery.
>> > IIUC we already set it to the node name for both EAP and JDG
>> >
>> >
>> https://github.com/jboss-openshift/cct_module/blob/master/os-eap70-openshift/added/standalone-openshift.xml#L411
>> >
>> >
>> https://github.com/jboss-openshift/cct_module/blob/master/os-jdg7-conffiles/added/clustered-openshift.xml#L282
>>
> > which in turn defaults to the pod name ? so which profiles are we
>
>
>> > talking about here?
>> >
>>
>> Granted, we set it by default in CCT Modules. However in Infinispan we
>> just
>> grab provided transaction subsystem when rendering full configuration from
>> featurepacks:
>>
>> https://github.com/infinispan/infinispan/blob/master/server/integration/feature-pack/src/main/resources/configuration/standalone/subsystems-cloud.xml#L19
>>
>> The default configuration XML doesn't contain the `node-identifier`
>> attribute. I can add it manually in the cloud.xml but I believe the right
>> approach is to modify the transaction subsystem.
>>
>>
>> > Rado
>> >
>> > > Thanks,
>> > > Seb
>> > >
>> > > [1] usually set to node-identifier="${jboss.node.name}"
>> > >
>> > >
>>
> > > On Mon, Apr 9, 2018 at 10:39 AM Sanne Grinovero <sanne at
>> infinispan.org>
>> > > wrote:
>> > >>
>> > >> On 9 April 2018 at 09:26, Sebastian Laskawiec <slaskawi at
>> redhat.com>
>
>
>> > wrote:
>> > >> > Thanks for looking into it Sanne. Of course, we should add it (it
>> can
>> > be
>> > >> > set
>> > >> > to the same name as hostname since those are unique in Kubernetes).
>> > >> >
>> > >> > Created https://issues.jboss.org/browse/ISPN-9051 for it.
>> > >> >
>> > >> > Thanks again!
>> > >> > Seb
>> > >>
>> > >> Thanks Sebastian!
>> > >>
>> > >> >
>>
> > >> > On Fri, Apr 6, 2018 at 8:53 PM Sanne Grinovero <sanne at
>> infinispan.org>
>
>
>> > >> > wrote:
>> > >> >>
>> > >> >> Hi all,
>> > >> >>
>> > >> >> I've started to use the Infinispan Openshift Template and was
>> > browsing
>> > >> >> through the errors and warnings this produces.
>> > >> >>
>> > >> >> In particular I noticed "WFLYTX0013: Node identifier property is
>> set
>> > >> >> to the default value. Please make sure it is unique." being
>> produced
>> > >> >> by the transaction system.
>> > >> >>
>> > >> >> The node id is usually not needed for developer's convenience and
>> > >> >> assuming there's a single node in "dev mode", yet clearly the
>> > >> >> Infinispan template is meant to work with multiple nodes running
>> so
>> > >> >> this warning seems concerning.
>> > >> >>
>> > >> >> I'm not sure what the impact is on the transaction manager so I
>> asked
>> > >> >> on the Narayana forums; Tom pointed me to some thourough design
>> > >> >> documents and also suggested the EAP image does set the node
>> > >> >> identifier:
>> > >> >>  - https://developer.jboss.org/message/981702#981702
>> > >> >>
>> > >> >> WDYT? we probably want the Infinispan template to set this as
>> well,
>> > or
>> > >> >> silence the warning?
>> > >> >>
>> > >> >> Thanks,
>> > >> >> Sanne
>> > >> >> _______________________________________________
>> > >> >> infinispan-dev mailing list
>>
> > >> >> infinispan-dev at lists.jboss.org
>
>
>> > >> >> https://lists.jboss.org/mailman/listinfo/infinispan-dev
>> > >> >
>> > >> >
>> > >> > _______________________________________________
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>>
> > >> > infinispan-dev at lists.jboss.org
>
>
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