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From Azuryy Yu <azury...@gmail.com>
Subject Re: Namenode is failing with expception to join
Date Wed, 07 Aug 2013 07:38:04 GMT
Manish,

you stop HDFS then start HDFS on the standby name node right?

please looked at https://issues.apache.org/jira/browse/HDFS-5058

there are two solutions:
1) start HDFS on the active name node, nor SBN
2) copy {namenode.name.dir}/* to the SBN

I advice #1.




On Wed, Aug 7, 2013 at 3:00 PM, Manish Bhoge <manishbhoge@rocketmail.com>wrote:

> I have all configuration fine. But whenever i start namenode it fails with
> a below exception. No clue where to fix this?
>
> "2013-08-07 02:56:22,754 FATAL
> org.apache.hadoop.hdfs.server.namenode.NameNode: Exception in namenode join"
>
> 2013-08-07 02:56:22,751 INFO org.apache.hadoop.hdfs.server.namenode.FSImage: Number of
files = 1
> 2013-08-07 02:56:22,751 INFO org.apache.hadoop.hdfs.server.namenode.FSImage: Number of
files under construction = 0
> 2013-08-07 02:56:22,752 INFO org.apache.hadoop.hdfs.server.namenode.FSImage: Image file
of size 115 loaded in 0 seconds.
> 2013-08-07 02:56:22,752 INFO org.apache.hadoop.hdfs.server.namenode.FSImage: Loaded image
for txid 0 from /data/1/dfs/nn/current/fsimage_0000000000000000000
> 2013-08-07 02:56:22,752 INFO org.apache.hadoop.hdfs.server.namenode.FSImage: Reading
org.apache.hadoop.hdfs.server.namenode.RedundantEditLogInputStream@5f18223d expecting start
txid #1
> 2013-08-07 02:56:22,752 INFO org.apache.hadoop.hdfs.server.namenode.EditLogInputStream:
Fast-forwarding stream '/data/1/dfs/nn/current/edits_0000000000000515247-0000000000000515255'
to transaction ID 1
> 2013-08-07 02:56:22,753 INFO org.apache.hadoop.metrics2.impl.MetricsSystemImpl: Stopping
NameNode metrics system...
> 2013-08-07 02:56:22,754 INFO org.apache.hadoop.metrics2.impl.MetricsSystemImpl: NameNode
metrics system stopped.
> 2013-08-07 02:56:22,754 INFO org.apache.hadoop.metrics2.impl.MetricsSystemImpl: NameNode
metrics system shutdown complete.2013-08-07 02:56:22,754 FATAL org.apache.hadoop.hdfs.server.namenode.NameNode:
Exception in namenode join
> java.io.IOException: There appears to be a gap in the edit log.  We expected txid 1,
but got txid 515247.
>
>

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