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  1. ,
    Expert tip

    Take a look at this blog post on how to set up Grid2 https://goo.gl/rxzbE6. A user related (in the email group on the source) that using older selenium libs solves this exception.

Solutions on the web

via Google Groups by Ben Vogan, 1 year ago
via Stack Overflow by Farooque
, 1 year ago
Expected timestamp in the Flume event headers, but it was null
via hadooptutorial.info by Unknown author, 2 years ago
Expected timestamp in the Flume event headers, but it was null
via hadooptutorial.info by Unknown author, 1 year ago
Expected timestamp in the Flume event headers, but it was null
java.lang.NullPointerException: timestamp	at com.google.common.base.Preconditions.checkNotNull(Preconditions.java:229)	at io.druid.indexing.common.actions.SegmentAllocateAction.(SegmentAllocateAction.java:104)	at io.druid.indexing.appenderator.ActionBasedSegmentAllocator.allocate(ActionBasedSegmentAllocator.java:57)	at io.druid.segment.realtime.appenderator.FiniteAppenderatorDriver.getSegment(FiniteAppenderatorDriver.java:341)	at io.druid.segment.realtime.appenderator.FiniteAppenderatorDriver.add(FiniteAppenderatorDriver.java:195)	at io.druid.indexing.kafka.KafkaIndexTask.run(KafkaIndexTask.java:417)	at io.druid.indexing.overlord.ThreadPoolTaskRunner$ThreadPoolTaskRunnerCallable.call(ThreadPoolTaskRunner.java:436)	at io.druid.indexing.overlord.ThreadPoolTaskRunner$ThreadPoolTaskRunnerCallable.call(ThreadPoolTaskRunner.java:408)	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)