tutorials/spf4j

[sfc-gh-schen]

I follow the tutorial to run the two apps in spf4j, using the spf4j-ui to view the data, when open the spf4j-performance-monitoring.tsdb2 file, an error pops up at the terminal: Exception: java.lang.NoClassDefFoundError thrown from the UncaughtExceptionHandler in thread "AWT-EventQueue-0". What could be the cause? There is no more info can be found, hard to find out why there is such error.

[dkapil]

First of all, we can't keep the older versions because spf4j had dependencies that were available on bintray that is now sunset, so we had to upgrade to the newer versions of spf4j that is available on maven central.

But spf4j internally requires Avro, which is only available on the GitHub packages; for the GitHub packages repository, we need GitHub credentials that we can not keep in our repository.

The hack around is to keep the old versions of Avro which is available on Maven Central but that does not work with the new versions of spf4j-ui and hence the error that we are seeing.

Therefore, this issue can not be fixed until spf4j removes the dependency on Avro or the latest Avro is available on Maven Central.
Here is a related Github issue: zolyfarkas/spf4j#60