[wildfly-dev] Wildfly start-up as service script depends on console log to determinate start result

Fri Jun 12 01:25:07 EDT 2015

I think there is no easy fix, we can assume for example that after 3
seconds that the PID exists then the process is up and return OK, but if
the process stops latter, it will be a fake start.

I know that we should not rely on read the log as James stated, but until
we can figure out a better aproach this is my proposal, I can modify
wildfly-init-debian.sh to have this behavior

1. Add to logging subsystem to standalone*.xml:
            <logger category="org.jboss.as">
                <level name="INFO"/>
            </logger>

2. Remove JBOSS_CONSOLE_LOG and read JBOSS_LOG_DIR

3. If standalone read "$JBOSS_LOG_DIR/server.log"
 if domain read "$JBOSS_LOG_DIR/host-controller.log"
to find WFLYSRV0025 or the string used for EAP... this is probably volatile
but it's not changed frequently, in fact it has been changed only once.

4. Always check the status of pid (if dies return immediately).

5. If server.log is not found, deactivated or not print the correct output
there are two choices:
a. On wait timeout, send a warning about an unknow status (this is how
works right now).
b. On wait timeout, just check if PID is still up and return OK, otherwise
FAILURE.

I believe this approach avoids the problem of console log...

Best regards,

Jorge Solórzano
http://www.jorsol.com

On Thu, Jun 11, 2015 at 5:29 PM, Chao Wang <chaowan at redhat.com> wrote:

>  Thanks for your reply. Please see in-line below
>
> On 06/11/2015 12:44 AM, Brian Stansberry wrote:
>
> A couple thoughts:
>
> 1) Looking at wildfly-init-redhat.sh at least, I don't see how that
> check is actually testing for successful startup. It looks like it's
> just trying to delay start() returning for a while, max 30 secs.
>
> So, what purpose is this fulfilling?
>
>  My bad about issue background. It's actually an case in EAP 6 (not yet in
> wildfly). EAP 6.x script has launched state like:
> https://github.com/jbossas/jboss-eap/blob/6.4.x/build/src/main/resources/bin/init.d/jboss-as-standalone.sh#L110
> (not in wildfly's script). Also, console log handler has been removed only
> in EAP full-ha mode long time ago due to performance concern.(wildfly keeps
> it for the moment). This leads to issue in bz1224170
> <https://bugzilla.redhat.com/show_bug.cgi?id=1224170>.
> That's why I try to seek an better option than current behavior from
> wildfly.
>
> 2) How does other software solve this problem? If it's solving a valid
> problem, it seems like there would be a typical solution.
>
>  I have checked some other application servers, most of them let users
> themselves to write a script to run as service for their OS. Geronimo does
> provide a script, Although I did damage to its configuration file to make a
> fatal error, terminal output still displays "Server started". In fact,
> process does not event exist and detail error can be seen in log file.
>
> On 6/9/15 8:59 AM, Chao Wang wrote:
>
>  Hi all,
>
> The Wildfly start-up as service scripts wildfly-init-redhat.sh and
> wildfly-init-debian.sh currently depend on a grep action of key message
> 'WFLYSRV0025:' in console log to determinate whether service start is
> successful. The log message indication is accurate, however, it's not
> that robust since user can always remove console handler from logging
> subsystem. I have opened a WFCORE enhancement jirahttps://issues.jboss.org/browse/WFCORE-747 for it.
>
> For the moment, I have tried three options, they're all not that perfect
> to implement
>
> 1. Stay with exact log message, users need to define their jboss log
> directory such as $JBOSS_HOME/standalone/log/server.log for standalone
> and $JBOSS_HOME/domain/log/host-controller.log for domain instead of
> searching in console log. This is more like another workaround since it
> is also volatile once we update log message in future release.(EAP has
> 'JBAS015874:')
>
> 2. Use service pid, this is not precise because a long start-up can
> crash in the last second. It needs to wait a suitable seconds before
> checking pid existence. and still it can not avoid fake success in rare
> case just before timeout.
>
> 3. Use read-attribute server-state through CLI connection as I did in
> Pull Request on Jira. This is declined as it is possible that
> authentication is required before connection. In such case, any  non
> encrypted password is not advised in configuration files.
>
> Therefore, I would like to listen for your opinions for them. Any other
> suggestion is certainly welcomed in mail or on jira.
> 
>
> Best regards,
>
> Chao
>
>
> _______________________________________________
> wildfly-dev mailing listwildfly-dev at lists.jboss.orghttps://lists.jboss.org/mailman/listinfo/wildfly-dev
>
>
> [1] https://bugzilla.redhat.com/show_bug.cgi?id=1224170
>
> --
> Chao Wang
> Software Engineer
> JBoss by Red Hat
>
>
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>
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