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java.lang.NullPointerException at com.googlecode.jmxtrans.model.output.support.opentsdb.OpenTSDBMessageFormatter.processOneMetric(OpenTSDBMessageFormatter.java:196) at com.googlecode.jmxtrans.model.output.support.opentsdb.OpenTSDBMessageFormatter.formatResult(OpenTSDBMessageFormatter.java:159) at com.googlecode.jmxtrans.model.output.support.opentsdb.OpenTSDBMessageFormatter.access$000(OpenTSDBMessageFormatter.java:54) at com.googlecode.jmxtrans.model.output.support.opentsdb.OpenTSDBMessageFormatter$1.apply(OpenTSDBMessageFormatter.java:170) at com.googlecode.jmxtrans.model.output.support.opentsdb.OpenTSDBMessageFormatter$1.apply(OpenTSDBMessageFormatter.java:166) at com.google.common.collect.Iterators$8.transform(Iterators.java:817) at com.google.common.collect.TransformedIterator.next(TransformedIterator.java:48) at com.google.common.collect.TransformedIterator.next(TransformedIterator.java:48) at com.google.common.collect.Iterators$5.hasNext(Iterators.java:569) at com.google.common.collect.ImmutableList.copyOf(ImmutableList.java:249) at com.google.common.collect.ImmutableList.copyOf(ImmutableList.java:209) at com.google.common.collect.FluentIterable.toList(FluentIterable.java:484) at com.googlecode.jmxtrans.model.output.support.opentsdb.OpenTSDBMessageFormatter.formatResults(OpenTSDBMessageFormatter.java:173) at com.googlecode.jmxtrans.model.output.OpenTSDBWriter.internalWrite(OpenTSDBWriter.java:116) at com.googlecode.jmxtrans.model.output.BaseOutputWriter.doWrite(BaseOutputWriter.java:157) at com.googlecode.jmxtrans.jmx.ResultProcessor$1.run(ResultProcessor.java:58) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at java.lang.Thread.run(Thread.java:745)