flume - Flume 事件 header 中的预期时间戳，但它为空

Question

我正在使用以下配置详细信息使用 Flume 将 Twitter 提要推送到 HDFS，但在 Flume 事件 header 中获得预期时间戳，但它为空

twitter.conf

TwitterAgent.sources = Twitter
TwitterAgent.channels = MemChannel
TwitterAgent.sinks = HDFS

TwitterAgent.sources.Twitter.type = org.apache.flume.source.twitter.TwitterSource
TwitterAgent.sources.Twitter.channels = MemChannel
TwitterAgent.sources.Twitter.consumerKey = xxxxxxxxxxxxxxxxxxxxx
TwitterAgent.sources.Twitter.consumerSecret = xxxxxxxxxxxxxxxxxxxxxxxx
TwitterAgent.sources.Twitter.accessToken =  xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
TwitterAgent.sources.Twitter.accessTokenSecret = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
TwitterAgent.sources.Twitter.keywords = bigdata, hadoop, hive, hbase
TwitterAgent.sinks.HDFS.channel = MemChannel
TwitterAgent.sinks.HDFS.type = hdfs
TwitterAgent.sinks.HDFS.hdfs.path = /user/farooque/bigdata/tweets/%Y/%m/%d/%H/
TwitterAgent.sinks.HDFS.hdfs.fileType = DataStream
TwitterAgent.sinks.HDFS.hdfs.writeFormat = Text
TwitterAgent.sinks.HDFS.hdfs.batchSize = 10
TwitterAgent.sinks.HDFS.hdfs.rollSize = 0
TwitterAgent.sinks.HDFS.hdfs.rollCount = 10000

TwitterAgent.channels.MemChannel.type = memory
TwitterAgent.channels.MemChannel.capacity = 10000
TwitterAgent.channels.MemChannel.transactionCapacity = 100

运行命令

$ flume-ng agent --conf-file twitter.conf --name TwitterAgent

哪里 twitter.conf是我的配置文件名

但得到错误为:

java.lang.NullPointerException: Expected timestamp in the Flume event headers, but it was null
        at com.google.common.base.Preconditions.checkNotNull(Preconditions.java:204)
        at org.apache.flume.formatter.output.BucketPath.replaceShorthand(BucketPath.java:200)
        at org.apache.flume.formatter.output.BucketPath.escapeString(BucketPath.java:396)
        at org.apache.flume.sink.hdfs.HDFSEventSink.process(HDFSEventSink.java:388)
        at org.apache.flume.sink.DefaultSinkProcessor.process(DefaultSinkProcessor.java:68)
        at org.apache.flume.SinkRunner$PollingRunner.run(SinkRunner.java:147)
        at java.lang.Thread.run(Thread.java:745)
15/06/04 18:26:01 ERROR flume.SinkRunner: Unable to deliver event. Exception follows.

寻求进一步的帮助？

Answer 1

在 twitter.conf 添加了另一个配置属性作为

TwitterAgent.sinks.HDFS.hdfs.useLocalTimeStamp = true

问题得到解决。

更多详情 Refer Hadoop tutorial.info