Error invoking CFC for gateway: null

Another example of small error, which can take a lot of time to resolve.

One of my event gateway has stopped working after upgrade and I stumbled across Error invoking CFC for gateway XXX: null error in eventgateway.log file.

After some guessing about the cause of this error and trying to fix this and that bits of code, I have finally checked exception.log file and discovered same error, but it had more details on where to look:

1. "Error","Thread-23","02/02/10","23:29:09",,"Error invoking CFC for gateway XXX: null {ORIGINATORID={CFMLGateway},DATA={{...}}},GATEWAYID={XXX},GATEWAYTYPE={CFMLGateway}}."

2 coldfusion.runtime.AbortException

3 at coldfusion.tagext.lang.AbortTag.doStartTag(AbortTag.java:63)

4 at coldfusion.runtime.CfJspPage._emptyTcfTag(CfJspPage.java:2661)

5 at cfxxxecfc750176571$funcONINCOMINGMESSAGE.runFunction(/var/.../xxx.cfc:19)

So that line 19 of gateway's cfc code had <cfabort> tag, which caused the error.