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Re: Passing commandline arguments to Mapper class - Hadoop - [mail # user]
...When you are passing a commandline argument while running the job (using '-D'), then it is set for you in the configuration whenever job's configuration is created.  On Sat, Oct 2, 2010...
   Author: Ted Yu, 2010-10-03, 00:29
[expand - 1 more] - Re: java.lang.RuntimeException: java.io.EOFException at org.apache.hadoop.io.WritableComparator.compare(WritableComparator.java:103) - Hadoop - [mail # user]
...Line 84 is empty. Line 83 is:           out.writeUTF(query_id);  Please send the stack trace that corresponds to your attachment.  In the very begining of ...
   Author: Ted Yu, 2010-09-30, 17:42
[expand - 1 more] - Re: Proper blocksize and io.sort.mb setting when using compressed LZO files - Hadoop - [mail # user]
...The default is 100MB for InMemory File System:       int size = Integer.parseInt(conf.get("fs.inmemory.size.mb", "100")); ./src/core/org/apache/hadoop/fs/InMemoryFileSystem.ja...
   Author: Ted Yu, 2010-09-27, 16:40
[expand - 1 more] - Re: java.lang.OutOfMemoryError: GC overhead limit exceeded - Hadoop - [mail # user]
...-1 means there is no limit to reusing. At the same time, you can generate heap dump from OOME and analyze with YourKit, etc.  Cheers  On Sun, Sep 26, 2010 at 1:19 PM, Bradford Step...
   Author: Ted Yu, 2010-09-26, 21:35
Re: A new way to merge up those small files! - Hadoop - [mail # user]
...Edward: Thanks for the tool.  I think the last parameter can be omitted if you follow what hadoop fs -text does. It looks at a file's magic number so that it can attempt to *detect* the...
   Author: Ted Yu, 2010-09-25, 16:05
Re: My mappers stop responding even though they reach 100% - Hadoop - [mail # user]
...Does your mapper access external resources which may take some time to return ?  On Thu, Sep 9, 2010 at 11:28 AM, Pavel Gutin  wrote:  ...
   Author: Ted Yu, 2010-09-10, 03:19
Re: Sort with customized input/output !! - Hadoop - [mail # user]
...Please get hadoop source code and read the comment at the beginning of SequenceFile.java:  * Essentially there are 3 different formats for SequenceFiles ...  On Tue, Sep 7, 2010 at...
   Author: Ted Yu, 2010-09-08, 03:59
Re: Why does Generic Options Parser only take the first -D option? - Hadoop - [mail # user]
...I checked GenericOptionsParser from 0.20.2 processGeneralOptions() should be able to process all -D options:      if (line.hasOption('D')) { *      String[] pro...
   Author: Ted Yu, 2010-09-02, 18:29
Re: [DISCUSS] Hadoop Security Release off Yahoo! patchset - Hadoop - [mail # general]
...This would imply hadoop-0.20-security-append or hadoop-0.20-append-security release be created which contains security and append features.  On Thu, Aug 26, 2010 at 4:22 PM, Arun C Murt...
   Author: Ted Yu, 2010-08-26, 23:30
Re: WARNING : There are about 1 missing blocks. Please check the log or run fsck. - Hadoop - [mail # general]
...Run fsck.  On Thu, Aug 26, 2010 at 5:56 AM, vaibhav negi wrote:  ...
   Author: Ted Yu, 2010-08-26, 16:41
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