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Re: how can i fix this? ERROR 1000: Error during parsing. thanks - Pig - [mail # user]
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...Looks like pig is trying to create an instance using the default constructo r. Can you try adding a default constructor to the udf class - one with no arguments? -Thejas O...
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Author: Thejas M Nair,
2010-08-11, 18:48
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Re: does Pig sit on every node in cluster or just namenode??? Please help - Pig - [mail # user]
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...How are you invoking the pig query ? When you say it makes use of only the namenode, does it mean that it is running in local mode ?Or do you mean the namedone also a datanode an...
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Author: Thejas M Nair,
2010-08-10, 14:57
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Re: UDF with dependency on external jars & native code - Pig - [mail # user]
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... On 8/4/10 3:13 AM, "Kaluskar, Sanjay" wrote: Do you know what change in mapred-site.xml caused it to stop working ? Is i t after adding mapred.cache.archives ? &nb...
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Author: Thejas M Nair,
2010-08-04, 18:46
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Re: question on pig join - Pig - [mail # user]
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...I am not sure about what you meant by "null match". Would this work ? F1 = load 'largefile' as (field1,..); F2 = load 'smallfile' as (field2, ..); J = join F1 by fiel...
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Author: Thejas M Nair,
2010-08-02, 19:35
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Re: dereference bag of tuples of fields - Pig - [mail # user]
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...Can you given an example of your data, and what output you want from the pi g query ? That will help me understand what you want the query to do . From the schem a and query, that is n...
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Author: Thejas M Nair,
2010-07-30, 22:38
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Re: Java heap error - Pig - [mail # user]
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...Hi Syed, Disabling the combiner in the pig query should get this working. As I mentioned, it looks like combiner is being used in your query. You can confirm that by running explain on...
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Author: Thejas M Nair,
2010-07-29, 19:38
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Re: UDF with dependency on external jars & native code - Pig - [mail # user]
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...You can use the MR distributed cache to push the native libs - see - http://hadoop.apache.org/common/docs/r0.20.1/mapred_tutorial.html#Distribut e dCache "The DistributedCache can also...
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Author: Thejas M Nair,
2010-07-29, 17:46
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Re: parallism level - Pig - [mail # user]
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...Please see http://hadoop.apache.org/pig/docs/r0.7.0/piglatin_ref2.html . You can use Oset default_parallel 10¹ to ask query to use 10 reducers for all MR jobs, or specify Oparallel x¹ ...
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Author: Thejas M Nair,
2010-07-29, 17:18
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Re: UNION -- Ordered - Pig - [mail # user]
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...As you observed, union does not guarantee the ordering . You will need to p roject an additional column indicating the order you want, so that you can do an order-by on it. -Thej...
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Author: Thejas M Nair,
2010-07-29, 01:05
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Re: Group by is not working with Filter - Pig - [mail # user]
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...This looks like a bug , can you please open a jira ? Adding following statements to this script get it to work - grunt> f = foreach G1 generate group.a1 as a1, group.a2 as a2, A; gr...
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Author: Thejas M Nair,
2010-07-29, 00:48
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