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Re: One NameNode keeps Rolling Edit Log on HDFS Federation - MapReduce - [mail # user]
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...Mike, I don't see how SPOF comes into the picture when HA is already present in the releases that also carry Federation and each NN (federated or non) can be assigned further Standby-N...
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Author: Harsh J,
2013-02-24, 19:46
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Re: One NameNode keeps Rolling Edit Log on HDFS Federation - MapReduce - [mail # user]
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...Hi, Federated namenodes are independent of one another (except that they both get reports from all the/common DNs in the cluster). It is natural to see one roll its edit logs based on ...
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Author: Harsh J,
2013-02-24, 16:48
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Re: MapReduce processing with extra (possibly non-serializable) configuration - MapReduce - [mail # user]
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...How do you imagine sending "data" of any kind (be it in object form, etc.) over the network to other nodes, without implementing or relying on a serialization for it? Are you looking for "ea...
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Author: Harsh J,
2013-02-22, 06:15
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[MAPREDUCE-4692] Investigate and remove MR1 JTConfig and its constants use in the MR project on trunk - MapReduce - [issue]
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...Filed on behalf of Robert from MAPREDUCE-3223Are there any JIRAs to deprecate the configs from where they reside in the code? ./hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapred...
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http://issues.apache.org/jira/browse/MAPREDUCE-4692
Author: Harsh J,
2013-02-22, 00:45
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Re: copy chunk of hadoop output - MapReduce - [mail # user]
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...No problem JM, I was confused as well. AFAIK, there's no shell utility that can let you specify an offset # of bytes to start off with (similar to skip in dd?), but that can be done fr...
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Author: Harsh J,
2013-02-20, 20:21
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Re: copy chunk of hadoop output - MapReduce - [mail # user]
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...You can instead use 'fs -cat' and the 'head' coreutil, as one example: hadoop fs -cat 100-byte-dfs-file | head -c 5 > 5-byte-local-file On Wed, Feb 20, 2013 at 3:38 AM, jamal ...
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Author: Harsh J,
2013-02-19, 22:14
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Re: webapps/ CLASSPATH err - MapReduce - [mail # user]
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...Hi Keith, The webapps/hdfs bundle is present at $HADOOP_PREFIX/share/hadoop/hdfs/ directory of the Hadoop 2.x release tarball. This should get on the classpath automatically as well. &...
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Author: Harsh J,
2013-02-19, 19:43
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Re: Trouble in running MapReduce application - MapReduce - [mail # user]
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...Hi, The new error usually happens if you compile using Java 7 and try to run via Java 6 (for example). That is, an incompatibility in the runtimes for the binary artifact produced. &nb...
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Author: Harsh J,
2013-02-19, 17:44
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Re: Namenode formatting problem - MapReduce - [mail # user]
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...To simplify my previous post, your IPs for the master/slave/etc. in /etc/hosts file should match the ones reported by "ifconfig" always. In proper deployments, IP is static. If IP is dynamic...
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Author: Harsh J,
2013-02-19, 16:25
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Re: Namenode formatting problem - MapReduce - [mail # user]
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...Hey Keith, I'm guessing whatever "ip-13-0-177-110" is resolving to (ping to check), is not what is your local IP on that machine (or rather, it isn't the machine you intended to start ...
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Author: Harsh J,
2013-02-19, 16:23
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