Exception when running crossmatch with Spark 3.0.0 version

[stargaser]

I've installed at IPAC the automated build version that @stevenstetzler mentioned in #26:

Yeah, the automated builds seem to work still. I recently used it to make a new Spark 3 release with an updated version of Scala (I was running into similar issues as @stargaser using Spark 3 with AXS until I updated Scala).

When I run crossmatch, an exception is raised that I think is the same as the one I encountered when I built axs and axs-spark myself from the instructions in #20. Does this mean I need to upgrade Scala, and if so, what version should I have?

The informational part of the exception:

Py4JJavaError: An error occurred while calling o234.crossmatch.
: java.lang.NoSuchMethodError: scala.Predef$.refArrayOps([Ljava/lang/Object;)Lscala/collection/mutable/ArrayOps;
	at org.dirac.axs.FrameFunctions$.crossmatch(FrameFunctions.scala:42)
	at org.dirac.axs.FrameFunctions.crossmatch(FrameFunctions.scala)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:497)
	at py4j.reflection.MethodInvoker.invoke(MethodInvoker.java:244)
	at py4j.reflection.ReflectionEngine.invoke(ReflectionEngine.java:357)
	at py4j.Gateway.invoke(Gateway.java:282)
	at py4j.commands.AbstractCommand.invokeMethod(AbstractCommand.java:132)
	at py4j.commands.CallCommand.execute(CallCommand.java:79)
	at py4j.GatewayConnection.run(GatewayConnection.java:238)
	at java.lang.Thread.run(Thread.java:745)

[stargaser]

I think I found my problem. I had spark.jars in the $SPARK_HOME/conf/spark-defaults.conf file pointing to the wrong jar for AxsUtilities. I can run a crossmatch with a local cluster now.

[stargaser]

Now that I have fixed spark.jars, I can crossmatch. I see that the upgraded Scala is in one of the jar files. I am closing this issue.