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M/R Run-time error: already loaded

Question asked by thealy on Apr 20, 2015
Running Version / M3

I updated an M/R job that has run for ~2 years, prior to be being off-line for the past few months due to a data format change. The only code changes relate to a modified AVRO schema change. When I went to build and run the code, I had to add these three jars to resolve several "class not found" issues:


But now when run in debug mode within NetBeans or from the command line, it fails saying:

util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable

security.JniBasedUnixGroupsMappingWithFallback: Falling back to shell based

java.lang.UnsatisfiedLinkError: Native Library /opt/mapr/lib/ already loaded in another classloader

I don't understand what this error is telling me. What is the "other" classloader, and how can I get it running again?

Thanks for any suggestions.