Synchrony fail with NullPointerException at first request

[Guido Jäkel]

I try to enable Collaborative Editing, but it's not working. I checked different things, but it seems to be no network communication problem.The JVM with Synchrony is successfully lauched, but die on the first requst which is reported by an HTTP-RC 500.

20190628-091910.283 INFO [ListenableFutureAdapter-thread-13] [] [DefaultSynchronyConfigurationManager] [Collab editing plugin] Synchrony response (500): Could not verify AppID/Secret for real-time collaboration service at endpoint: http://127.0.0.1:8091/synchrony/v1/apps/secret
20190628-091910.284 WARN [ListenableFutureAdapter-thread-13] [] [DefaultSynchronyConfigurationManager] [Collab editing plugin] Response message for Synchrony-aff9ab3c-a799-37ee-888a-79e6af399f99: Internal Server Error

Following this guide, I confirmed that the application seems to fail to interact with the database because the key's in table BANDANA are not found in SECRETS .

Until yet, I was not able to configure the logging to write down something. But by help of

# kill $(pidof -o 38490 java) && java -classpath <path_to_confluence_sources>/ROOT/WEB-INF/packages/synchrony-standalone.jar:/usr/share/jdbc-mysql/lib/jdbc-mysql.jar -Xss2048k -Xmx1g -Djava.net.preferIPv4Stack=true -Dsynchrony.database.url=jdbc:mysql://mysql.dnb.de.test:03306/jiraT -Dsynchrony.database.username=**** -Dsynchrony.database.password=***** synchrony.core sql

I was able to launch Synchrony in a shell. The Confluence Synchrony Watchdog will detect this within seconds and will restart the pairing. As the next request arrives, the Synchrony application bail out with an NPE:

WARNING: boolean? already refers to: #'clojure.core/boolean? in namespace: medley.core, being replaced by: #'medley.core/boolean?
WARNING: Inst already refers to: #'clojure.core/Inst in namespace: schema.core, being replaced by: #'schema.core/Inst
Exception in thread "main" java.lang.NullPointerException
at synchrony.config$load_config_from_env.invokeStatic(config.clj:182)
at synchrony.config$load_config_from_env.invoke(config.clj:164)
at synchrony.core$_main.invokeStatic(core.clj:31)
at synchrony.core$_main.doInvoke(core.clj:30)
at clojure.lang.RestFn.applyTo(RestFn.java:137) at synchrony.core.main(Unknown Source) 

Please, How to trace down what's failing here?

[Daniel Eads]

Hey Dr. Guido Jäkel!

I've noticed you've got a ticket in our support system about this issue and have been working with a support engineer already. In case we find a resolution for you that's useful to others, I'm keeping an eye on your ticket. Feel free to post any details you want to share here once the case is solved, otherwise I'll post a generalized fix for anybody else experiencing this issue that finds this question from search.

Cheers,
Daniel