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Flume >> mail # user >> Unable to deliver event. Exception follows. java.lang.NullPointerException


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Re: Unable to deliver event. Exception follows. java.lang.NullPointerException
Hi Hari,

Would you show me some instructions on how to do it right? Is there one in
documentation?

Thank you,

George
On Tue, Oct 29, 2013 at 12:52 PM, Hari Shreedharan <
[EMAIL PROTECTED]> wrote:

> Nope. You need to insert it at some other location.
>
>
> Thanks,
> Hari
>
> On Tuesday, October 29, 2013 at 12:48 PM, George Pang wrote:
>
> Hi Hari,
>
> Is it (inserting a rowKey header into event) something I can do in
> flume.conf? I tried to do that but I am new to flume.
>
> Thank you,
>
> George
>
>
> On Tue, Oct 29, 2013 at 12:40 PM, Hari Shreedharan <
> [EMAIL PROTECTED]> wrote:
>
>  Did you insert a rowKey header into the event? If the header is not
> there, you are obviously going to get null returned from
> currentEvent.getHeaders().get(“rowKey”). You need to insder the header into
> the event at some point.
>
>
> Thanks,
> Hari
>
> On Tuesday, October 29, 2013 at 12:30 PM, George Pang wrote:
>
> Hi Ashish,
>
> Actually it starts with headers. In the example code has "  String
> rowKeyStr = currentEvent.getHeaders().get("rowKey");" but there is no such
> header found. If I get rid of this line, the rest will complain unable to
> deliver event. But I checked the event, it's not null.
>
> I am trying to use flume to save to hbase, and use the example
> http://blog.cloudera.com/blog/2012/11/streaming-data-into-apache-hbase-using-apache-flume/for customized serializer.
>
> flume.conf:
>
> logger-agent.sources = Syslog-UDP
> logger-agent.sinks = Syslog-HBase
> logger-agent.channels = Syslog-HBase-Channel
>
> logger-agent.sources.Syslog-UDP.channels = Syslog-HBase-Channel
> logger-agent.sinks.Syslog-HBase.channel = Syslog-HBase-Channel
>
> logger-agent.sources.Syslog-UDP.type = syslogudp
> logger-agent.sources.Syslog-UDP.port = 5140
> logger-agent.sources.Syslog-UDP.host = localhost
>
> logger-agent.sinks.Syslog-HBase.type = org.apache.flume.sink.hbase.
> AsyncHBaseSink
> logger-agent.sinks.Syslog-HBase.table = syslog2
> logger-agent.sinks.Syslog-HBase.columnFamily = cluster
> logger-agent.sinks.Syslog-HBase.serializer.payloadColumn = dev
> logger-agent.sinks.Syslog-HBase.serializer.incrementColumn = icol
> logger-agent.sinks.Syslog-HBase.serializer.columns > forum,inbound,outbound
> logger-agent.sinks.Syslog-HBase.batchSize = 5000
> logger-agent.sinks.Syslog-HBase.serializer = org.apache.flume.sink.hbase.
> SimpleAsyncHbaseEventSerializer
>
> logger-agent.channels.Syslog-HBase-Channel.type = memory
>
>
> Flume version: 1.4
>
> org.apache.flume.FlumeException: No row key found in headers!
>     at com.ib.SplittingSerializer.setEvent(SplittingSerializer.java:43)
>     at
> org.apache.flume.sink.hbase.AsyncHBaseSink.process(AsyncHBaseSink.java:184)
>     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:662)
>
>  Thank you,
>
> George
>
>
>
> On Tue, Oct 29, 2013 at 2:29 AM, Ashish <[EMAIL PROTECTED]> wrote:
>
> George,
>
> Can you share more details about what you are trying to achieve? If
> possible, please share Flume version, Agent configuration and exception
> stacktrace.
> You may also look at HBase Sink for more info
> http://flume.apache.org/FlumeUserGuide.html#hbasesinks
>
>
> On Tue, Oct 29, 2013 at 2:50 PM, George Pang <[EMAIL PROTECTED]> wrote:
>
> I use the serializer example in this blog post:
> http://blog.cloudera.com/blog/2012/11/streaming-data-into-apache-hbase-using-apache-flume/
>
> but got "Unable to deliver event. Exception follows.
> java.lang.NullPointerException". From looking it up in forums, I think it
> may be caused by empty header. If so, how is a timestamp header is added?
> if not what cause the event undelivery to happen?
>
> Thank you,
>
> George
>
>
>
>
> --
> thanks
> ashish
>
> Blog: http://www.ashishpaliwal.com/blog
> My Photo Galleries: http://www.pbase.com/ashishpaliwal
>
>
>
>
>
>
NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB