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From Brahma Reddy Battula <brahmareddy.batt...@huawei.com>
Subject RE: java.io.FileNotFoundException: http://HOSTNAME:50070/getimage?getimage=1
Date Mon, 03 Feb 2014 06:27:47 GMT
Hi

>From your mail, you are facing following problems.(Mainly NameNode HTTP requests are not
going)

i) Checkpoint is not happening

With 1.0.4, only one checkpoint process is executed at a time. When the namenode gets an overlapping
checkpointing request, it checks edit.new in its storage directories. If namenode have this
file, namenode concludes the previous checkpoint process is not done yet and prints the warning
message you've seen.
This is the case if you ensure edits.new file before the error operation residual useless
files can be deleted after the detection of whether there is such a problem

In your case While checkpoint was inprogress power failure might occured hence edits.new file
was not renamed...Hope before power failure checkpoint was success..


ii) Not able browse the Namenode UI.


I think,,Mostly hostmapping is missconfigured or hostname is changed(Can you cross check hostname
you configured in /etc/hosts and hostname of the machine is correct or not).

Why hostname is different from the /etc/hosts to Configuration,..?

>From /etc/hosts/

IP1 Hostname1 # Namenode- vm01 - itself



>From Configurations :



<property>
<name>dfs.http.address</name>
<value>HOSTNAME:50070</value>
</property>





In this case ./hadoop fsck / also should not work. can you please try and send us the result..







    Thanks & Regards

 Brahma Reddy Battula





________________________________
From: Stuti Awasthi [stutiawasthi@hcl.com]
Sent: Monday, February 03, 2014 10:11 AM
To: user
Subject: RE: java.io.FileNotFoundException: http://HOSTNAME:50070/getimage?getimage=1

Hi All,

Any other tips that can resolve this issue ??
Please suggest

Thanks
Stuti Awasthi

From: Jitendra Yadav [mailto:jeetuyadav200890@gmail.com]
Sent: Friday, January 31, 2014 8:26 PM
To: user
Subject: Re: java.io.FileNotFoundException: http://HOSTNAME:50070/getimage?getimage=1

ohh I didn't realized that you are still using 1.0.4 release, yes the property was deprecated
in new releases.

Thanks
Jitendra

On Fri, Jan 31, 2014 at 7:39 PM, Stuti Awasthi <stutiawasthi@hcl.com<mailto:stutiawasthi@hcl.com>>
wrote:
Hadoop version is 1.0.4
In hdfs-default.html for 1.0.4 version we have following property:
dfs.http.address
dfs.secondary.http.address


dfs.namenode.http-address : I suppose this property is not valid for Hadoop 1.x

Please suggest

Thanks
From: Jitendra Yadav [mailto:jeetuyadav200890@gmail.com<mailto:jeetuyadav200890@gmail.com>]
Sent: Friday, January 31, 2014 7:26 PM

To: user
Subject: Re: java.io.FileNotFoundException: http://HOSTNAME:50070/getimage?getimage=1

Can you please change below property and restart your cluster again?

FROM:
  <name>dfs.http.address</name>

TO:
  <name>dfs.namenode.http-addres</name>

Thanks
Jitendra

On Fri, Jan 31, 2014 at 7:07 PM, Stuti Awasthi <stutiawasthi@hcl.com<mailto:stutiawasthi@hcl.com>>
wrote:
Hi Jitendra,

I realized that some days back ,my cluster was down due to power failure after which nn/current
directory has : edits, edits.new file and now SNN is not rolling these edits due to HTTP error.
Also currently my NN and SNN are operating on same machine


DFSadmin report :

Configured Capacity: 659494076416 (614.2 GB)
Present Capacity: 535599210496 (498.82 GB)
DFS Remaining: 497454006272 (463.29 GB)
DFS Used: 38145204224 (35.53 GB)
DFS Used%: 7.12%
Under replicated blocks: 283
Blocks with corrupt replicas: 3
Missing blocks: 3

-------------------------------------------------
Datanodes available: 8 (8 total, 0 dead)

Name: 10.139.9.238:50010<http://10.139.9.238:50010>
Decommission Status : Normal
Configured Capacity: 82436759552 (76.78 GB)
DFS Used: 4302274560<tel:4302274560> (4.01 GB)
Non DFS Used: 8391843840 (7.82 GB)
DFS Remaining: 69742641152(64.95 GB)
DFS Used%: 5.22%
DFS Remaining%: 84.6%
Last contact: Fri Jan 31 18:55:18 IST 2014


Name: 10.139.9.233:50010<http://10.139.9.233:50010>
Decommission Status : Normal
Configured Capacity: 82436759552 (76.78 GB)
DFS Used: 5774745600 (5.38 GB)
Non DFS Used: 13409488896 (12.49 GB)
DFS Remaining: 63252525056(58.91 GB)
DFS Used%: 7.01%
DFS Remaining%: 76.73%
Last contact: Fri Jan 31 18:55:19 IST 2014


Name: 10.139.9.232:50010<http://10.139.9.232:50010>
Decommission Status : Normal
Configured Capacity: 82436759552 (76.78 GB)
DFS Used: 8524451840 (7.94 GB)
Non DFS Used: 24847884288 (23.14 GB)
DFS Remaining: 49064423424(45.69 GB)
DFS Used%: 10.34%
DFS Remaining%: 59.52%
Last contact: Fri Jan 31 18:55:21 IST 2014


Name: 10.139.9.236:50010<http://10.139.9.236:50010>
Decommission Status : Normal
Configured Capacity: 82436759552 (76.78 GB)
DFS Used: 4543819776 (4.23 GB)
Non DFS Used: 8669548544<tel:8669548544> (8.07 GB)
DFS Remaining: 69223391232(64.47 GB)
DFS Used%: 5.51%
DFS Remaining%: 83.97%
Last contact: Fri Jan 31 18:55:19 IST 2014


Name: 10.139.9.235:50010<http://10.139.9.235:50010>
Decommission Status : Normal
Configured Capacity: 82436759552 (76.78 GB)
DFS Used: 5092986880<tel:5092986880> (4.74 GB)
Non DFS Used: 8669454336<tel:8669454336> (8.07 GB)
DFS Remaining: 68674318336(63.96 GB)
DFS Used%: 6.18%
DFS Remaining%: 83.31%
Last contact: Fri Jan 31 18:55:19 IST 2014


Name: 10.139.9.237:50010<http://10.139.9.237:50010>
Decommission Status : Normal
Configured Capacity: 82436759552 (76.78 GB)
DFS Used: 4604301312 (4.29 GB)
Non DFS Used: 11005788160 (10.25 GB)
DFS Remaining: 66826670080(62.24 GB)
DFS Used%: 5.59%
DFS Remaining%: 81.06%
Last contact: Fri Jan 31 18:55:18 IST 2014


Name: 10.139.9.234:50010<http://10.139.9.234:50010>
Decommission Status : Normal
Configured Capacity: 82436759552 (76.78 GB)
DFS Used: 4277760000 (3.98 GB)
Non DFS Used: 12124221440<tel:12124221440> (11.29 GB)
DFS Remaining: 66034778112(61.5 GB)
DFS Used%: 5.19%
DFS Remaining%: 80.1%
Last contact: Fri Jan 31 18:55:18 IST 2014


Name: 10.139.9.231:50010<http://10.139.9.231:50010>
Decommission Status : Normal
Configured Capacity: 82436759552 (76.78 GB)
DFS Used: 1024864256 (977.39 MB)
Non DFS Used: 36776636416 (34.25 GB)
DFS Remaining: 44635258880(41.57 GB)
DFS Used%: 1.24%
DFS Remaining%: 54.14%
Last contact: Fri Jan 31 18:55:20 IST 2014



From: Jitendra Yadav [mailto:jeetuyadav200890@gmail.com<mailto:jeetuyadav200890@gmail.com>]
Sent: Friday, January 31, 2014 6:58 PM
To: user
Subject: Re: java.io.FileNotFoundException: http://HOSTNAME:50070/getimage?getimage=1

Hi,

Please post the output of dfs report command, this could help us to understand cluster health.

# hadoop dfsadmin -report

Thanks
Jitendra

On Fri, Jan 31, 2014 at 6:44 PM, Stuti Awasthi <stutiawasthi@hcl.com<mailto:stutiawasthi@hcl.com>>
wrote:
Hi All,

I am suddenly started facing issue on Hadoop Cluster. Seems like HTTP request at port 50070
on dfs is not working properly.
I have an Hadoop cluster which is operating from several days. Recently we are also not able
to see dfshealth.jsp page from webconsole.

Problems :
1. http://<Hostname>:50070/dfshealth.jsp<https://email-cn.huawei.com/owa/UrlBlockedError.aspx>
shows following error

HTTP ERROR: 404
Problem accessing /. Reason:
NOT_FOUND

2. SNN is not able to roll edits :
ERROR in SecondaryNameNode Log
java.io.FileNotFoundException: http://HOSTNAME:50070/getimage?getimage=1
       at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1401)
       at org.apache.hadoop.hdfs.server.namenode.TransferFsImage.getFileClient(TransferFsImage.java:160)
       at org.apache.hadoop.hdfs.server.namenode.SecondaryNameNode$3.run(SecondaryNameNode.java:347)
       at org.apache.hadoop.hdfs.server.namenode.SecondaryNameNode$3.run(SecondaryNameNode.java:336)
       at java.security.AccessController.doPrivileged(Native Method)
       at javax.security.auth.Subject.doAs(Subject.java:416)
       at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1093)
       at org.apache.hadoop.hdfs.server.namenode.SecondaryNameNode.downloadCheckpointFiles(SecondaryNameNode.java:336)
       at org.apache.hadoop.hdfs.server.namenode.SecondaryNameNode.doCheckpoint(SecondaryNameNode.java:411)
       at org.apache.hadoop.hdfs.server.namenode.SecondaryNameNode.doWork(SecondaryNameNode.java:312)
       at org.apache.hadoop.hdfs.server.namenode.SecondaryNameNode.run(SecondaryNameNode.java:275)

ERROR in Namenode Log
2014-01-31 18:15:12,046 INFO org.apache.hadoop.hdfs.server.namenode.FSNamesystem: Roll Edit
Log from 10.139.9.231
2014-01-31 18:15:12,046 WARN org.apache.hadoop.hdfs.server.namenode.FSNamesystem: Cannot roll
edit log, edits.new files already exists in all healthy directories:
  /usr/lib/hadoop/storage/dfs/nn/current/edits.new



Namenode logs which suggest that webserver is started on 50070 successfully:
2014-01-31 14:42:35,208 INFO org.apache.hadoop.http.HttpServer: Port returned by webServer.getConnectors()[0].getLocalPort()
before open() is -1. Opening the listener on 50070
2014-01-31 14:42:35,209 INFO org.apache.hadoop.http.HttpServer: listener.getLocalPort() returned
50070 webServer.getConnectors()[0].getLocalPort() returned 50070
2014-01-31 14:42:35,209 INFO org.apache.hadoop.http.HttpServer: Jetty bound to port 50070
2014-01-31 14:42:35,378 INFO org.apache.hadoop.hdfs.server.namenode.NameNode: Web-server up
at: HOSTNAME:50070


Hdfs-site.xml
<configuration>
    <property>
        <name>dfs.replication</name>
        <value>2</value>
    </property>

    <property>
        <name>dfs.name.dir</name>
        <value>/usr/lib/hadoop/storage/dfs/nn</value>
    </property>

    <property>
        <name>dfs.data.dir</name>
        <value>/usr/lib/hadoop/storage/dfs/dn</value>
    </property>

    <property>
        <name>dfs.permissions</name>
        <value>false</value>
    </property>
<property>
  <name>dfs.webhdfs.enabled</name>
  <value>true</value>
</property>

<property>
  <name>dfs.http.address</name>
  <value>HOSTNAME:50070</value>
</property>

<property>
  <name>dfs.secondary.http.address</name>
  <value>HOSTNAME:50090</value>
</property>

<property>
  <name>fs.checkpoint.dir</name>
  <value>/usr/lib/hadoop/storage/dfs/snn</value>
</property>

</configuration>


/etc/hosts (Note I have also tried by commenting 127.0.0.1 entry in host file but the issue
was not resolved)

127.0.0.1       localhost

IP1    Hostname1         # Namenode- vm01 - itself
IP2    Hostname2         # DataNode- vm02
……..

# The following lines are desirable for IPv6 capable hosts
::1     ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters


Note : All Hadoop daemons are executing fine and the jobs are running properly.

How to resolve this issue, I have tried many options provided on different forums but still
facing the same issue.
I belive that this can cause a major problem later as my edits are not getting rolled into
fsimage.. This can cause me a data loss in case of failure.

Please suggest

Thanks
Stuti





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