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java.lang.NullPointerException: 	at org.apache.kafka.streams.processor.internals.StreamTask.forward(StreamTask.java:336)	at org.apache.kafka.streams.processor.internals.ProcessorContextImpl.forward(ProcessorContextImpl.java:187)	at com.heliosapm.streams.metrics.processors.AbstractStreamedMetricProcessor.forward(AbstractStreamedMetricProcessor.java:552)	at com.heliosapm.streams.metrics.processors.impl.StreamedMetricMeter.doProcess(StreamedMetricMeter.java:89)	at com.heliosapm.streams.metrics.processors.impl.StreamedMetricMeter.doProcess(StreamedMetricMeter.java:1)	at com.heliosapm.streams.metrics.processors.AbstractStreamedMetricProcessor.process(AbstractStreamedMetricProcessor.java:166)	at org.apache.kafka.streams.processor.internals.ProcessorNode.process(ProcessorNode.java:68)	at org.apache.kafka.streams.processor.internals.StreamTask.forward(StreamTask.java:338)	at org.apache.kafka.streams.processor.internals.ProcessorContextImpl.forward(ProcessorContextImpl.java:187)	at org.apache.kafka.streams.processor.internals.SourceNode.process(SourceNode.java:64)	at org.apache.kafka.streams.processor.internals.StreamTask.process(StreamTask.java:174)	at org.apache.kafka.streams.processor.internals.StreamThread.runLoop(StreamThread.java:320)	at org.apache.kafka.streams.processor.internals.StreamThread.run(StreamThread.java:218)