Grokbase Groups Hive user March 2011
FAQ
Looks like this is the command line it was executing:

2011-03-01 14:46:13,733 INFO org.apache.hadoop.hive.ql.exec.ScriptOperator: Executing [/usr/bin/python2.6, user_id_output.py, hbase]


From: Irfan Mohammed
Sent: Tuesday, March 01, 2011 1:39 PM
To: user@hive.apache.org
Subject: Re: cannot start the transform script. reason : "argument list too long"

Thanks Ajo.

The hive sql and the python script run fine with a dataset of ( < 10M ) records. It is only when running with a large dataset of ( > 100M ) records, that I run into this error. I have been trying to get to the number of records (10-100M) or the invalid data which is causing the error.

I am trying to get to the actual error from the UnixProcess instantiation.

On Tue, Mar 1, 2011 at 1:23 PM, Ajo Fod wrote:
instead of

using 'python2.6 user_id_output.py hbase'
try something like this:

using 'user_id_output.py'
... and a #! line with the location of the python binary.

I think you can include a parameter too in the call like :
using 'user_id_output.py hbase'

Cheers,
Ajo.

On Tue, Mar 1, 2011 at 8:22 AM, Irfan Mohammed wrote:
Hi,

I have a hive script [given below] which calls a python script using transform and for large datasets [ > 100M rows ], the reducer is not able to start the python process and the error message is "argument list too long". The detailed error stack is given below.

The python script takes only 1 static argument "hbase". For small datasets [ 1M rows ], the script works fine.

1. Is this problem related to the number of open file handles on the reducer box?
2. How do I get the correct error message?
3. Is there a way to get to the actual unix process with arguments it is instantiating?
Thanks,
Irfan
script >>>>>>>>>>>>>>>>>>>>>>>>>>>
true && echo "
set hive.exec.compress.output=true;
set io.seqfile.compression.type=BLOCK;
set mapred.output.compression.type=BLOCK;
set mapred.output.compression.codec=org.apache.hadoop.io.compress.GzipCodec;

set hive.merge.mapfiles=false;
set hive.exec.dynamic.partition=true;
set hive.exec.dynamic.partition.mode=nonstrict;
set hive.exec.max.dynamic.partitions=20000;

set hive.map.aggr=true;
set mapred.reduce.tasks=200;

add file /home/irfan/scripts/user_id_output.py;

from (
select
user_id,
source_id,
load_id,
user_id_json,
pid
from
user_id_bucket
where
1 = 1
and length(user_id) = 40
distribute by pid
sort by user_id, load_id desc
) T1
insert overwrite table user_id_hbase_stg1 partition (pid)
SELECT
transform
(
T1.user_id
, T1.source_id
, T1.load_id
, T1.user_id_json
, T1.pid
)
using 'python2.6 user_id_output.py hbase'
as user_id, user_id_info1, user_id_info2, user_id_info3, user_id_info4, user_id_info5, user_id_info3, pid
;

" > ${SQL_FILE};

true && ${HHIVE} -f ${SQL_FILE} 1>${TXT_FILE} 2>${LOG_FILE};
error log >>>>>>>>>>>>>>>>>>>>>>>>>
2011-03-01 14:46:13,705 INFO org.apache.hadoop.hive.ql.exec.ExtractOperator: Initializing Self 5 OP
2011-03-01 14:46:13,711 INFO org.apache.hadoop.hive.ql.exec.ExtractOperator: Operator 5 OP initialized
2011-03-01 14:46:13,711 INFO org.apache.hadoop.hive.ql.exec.ExtractOperator: Initializing children of 5 OP
2011-03-01 14:46:13,711 INFO org.apache.hadoop.hive.ql.exec.SelectOperator: Initializing child 6 SEL
2011-03-01 14:46:13,711 INFO org.apache.hadoop.hive.ql.exec.SelectOperator: Initializing Self 6 SEL
2011-03-01 14:46:13,711 INFO org.apache.hadoop.hive.ql.exec.SelectOperator: SELECT struct<_col0:string,_col1:string,_col2:string,_col3:string,_col4:string>
2011-03-01 14:46:13,711 INFO org.apache.hadoop.hive.ql.exec.SelectOperator: Operator 6 SEL initialized
2011-03-01 14:46:13,711 INFO org.apache.hadoop.hive.ql.exec.SelectOperator: Initializing children of 6 SEL
2011-03-01 14:46:13,711 INFO org.apache.hadoop.hive.ql.exec.ScriptOperator: Initializing child 7 SCR
2011-03-01 14:46:13,711 INFO org.apache.hadoop.hive.ql.exec.ScriptOperator: Initializing Self 7 SCR
2011-03-01 14:46:13,728 INFO org.apache.hadoop.hive.ql.exec.ScriptOperator: Operator 7 SCR initialized
2011-03-01 14:46:13,728 INFO org.apache.hadoop.hive.ql.exec.ScriptOperator: Initializing children of 7 SCR
2011-03-01 14:46:13,728 INFO org.apache.hadoop.hive.ql.exec.FileSinkOperator: Initializing child 8 FS
2011-03-01 14:46:13,728 INFO org.apache.hadoop.hive.ql.exec.FileSinkOperator: Initializing Self 8 FS
2011-03-01 14:46:13,730 INFO org.apache.hadoop.hive.ql.exec.FileSinkOperator: Operator 8 FS initialized
2011-03-01 14:46:13,730 INFO org.apache.hadoop.hive.ql.exec.FileSinkOperator: Initialization Done 8 FS
2011-03-01 14:46:13,730 INFO org.apache.hadoop.hive.ql.exec.ScriptOperator: Initialization Done 7 SCR
2011-03-01 14:46:13,730 INFO org.apache.hadoop.hive.ql.exec.SelectOperator: Initialization Done 6 SEL
2011-03-01 14:46:13,730 INFO org.apache.hadoop.hive.ql.exec.ExtractOperator: Initialization Done 5 OP
2011-03-01 14:46:13,733 INFO ExecReducer: ExecReducer: processing 1 rows: used memory = 89690888
2011-03-01 14:46:13,733 INFO org.apache.hadoop.hive.ql.exec.ExtractOperator: 5 forwarding 1 rows
2011-03-01 14:46:13,733 INFO org.apache.hadoop.hive.ql.exec.SelectOperator: 6 forwarding 1 rows
2011-03-01 14:46:13,733 INFO org.apache.hadoop.hive.ql.exec.ScriptOperator: Executing [/usr/bin/python2.6, user_id_output.py, hbase]
2011-03-01 14:46:13,733 INFO org.apache.hadoop.hive.ql.exec.ScriptOperator: tablename=null
2011-03-01 14:46:13,733 INFO org.apache.hadoop.hive.ql.exec.ScriptOperator: partname=null
2011-03-01 14:46:13,733 INFO org.apache.hadoop.hive.ql.exec.ScriptOperator: alias=null
2011-03-01 14:46:13,777 FATAL ExecReducer: org.apache.hadoop.hive.ql.metadata.HiveException: Hive Runtime Error while processing row (tag=0) {"key":{"reducesinkkey0":"AA11223344","reducesinkkey1":"20110210_02"},"value":{"_col0":"xxxxx","_col1":"m1","_col2":"20110210_02","_col3":"{'m07': 'x12', 'm02': 'x34', 'm01': 'm45'}","_col4":"0A9"},"alias":0}
at org.apache.hadoop.hive.ql.exec.ExecReducer.reduce(ExecReducer.java:253)
at org.apache.hadoop.mapred.ReduceTask.runOldReducer(ReduceTask.java:467)
at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:415)
at org.apache.hadoop.mapred.Child$4.run(Child.java:217)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:396)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1063)
at org.apache.hadoop.mapred.Child.main(Child.java:211)
Caused by: org.apache.hadoop.hive.ql.metadata.HiveException: Cannot initialize ScriptOperator
at org.apache.hadoop.hive.ql.exec.ScriptOperator.processOp(ScriptOperator.java:320)
at org.apache.hadoop.hive.ql.exec.Operator.process(Operator.java:457)
at org.apache.hadoop.hive.ql.exec.Operator.forward(Operator.java:697)
at org.apache.hadoop.hive.ql.exec.SelectOperator.processOp(SelectOperator.java:84)
at org.apache.hadoop.hive.ql.exec.Operator.process(Operator.java:457)
at org.apache.hadoop.hive.ql.exec.Operator.forward(Operator.java:697)
at org.apache.hadoop.hive.ql.exec.ExtractOperator.processOp(ExtractOperator.java:45)
at org.apache.hadoop.hive.ql.exec.Operator.process(Operator.java:457)
at org.apache.hadoop.hive.ql.exec.ExecReducer.reduce(ExecReducer.java:244)
... 7 more
Caused by: java.io.IOException: Cannot run program "/usr/bin/python2.6": java.io.IOException: error=7, Argument list too long
at java.lang.ProcessBuilder.start(ProcessBuilder.java:459)
at org.apache.hadoop.hive.ql.exec.ScriptOperator.processOp(ScriptOperator.java:279)
... 15 more
Caused by: java.io.IOException: java.io.IOException: error=7, Argument list too long
at java.lang.UNIXProcess.(ProcessImpl.java:65)
at java.lang.ProcessBuilder.start(ProcessBuilder.java:452)
... 16 more

2011-03-01 14:46:13,779 WARN org.apache.hadoop.mapred.Child: Error running child
java.lang.RuntimeException: org.apache.hadoop.hive.ql.metadata.HiveException: Hive Runtime Error while processing row (tag=0) {"key":{"reducesinkkey0":"AA11223344","reducesinkkey1":"20110210_02"},"value":{"_col0":"xxxxx","_col1":"m1","_col2":"20110210_02","_col3":"{'m07': 'x12', 'm02': 'x34', 'm01': 'm45'}","_col4":"0A9"},"alias":0}
at org.apache.hadoop.hive.ql.exec.ExecReducer.reduce(ExecReducer.java:265)
at org.apache.hadoop.mapred.ReduceTask.runOldReducer(ReduceTask.java:467)
at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:415)
at org.apache.hadoop.mapred.Child$4.run(Child.java:217)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:396)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1063)
at org.apache.hadoop.mapred.Child.main(Child.java:211)
Caused by: org.apache.hadoop.hive.ql.metadata.HiveException: Hive Runtime Error while processing row (tag=0) {"key":{"reducesinkkey0":"AA11223344","reducesinkkey1":"20110210_02"},"value":{"_col0":"xxxxx","_col1":"m1","_col2":"20110210_02","_col3":"{'m07': 'x12', 'm02': 'x34', 'm01': 'm45'}","_col4":"0A9"},"alias":0}
at org.apache.hadoop.hive.ql.exec.ExecReducer.reduce(ExecReducer.java:253)
... 7 more
Caused by: org.apache.hadoop.hive.ql.metadata.HiveException: Cannot initialize ScriptOperator
at org.apache.hadoop.hive.ql.exec.ScriptOperator.processOp(ScriptOperator.java:320)
at org.apache.hadoop.hive.ql.exec.Operator.process(Operator.java:457)
at org.apache.hadoop.hive.ql.exec.Operator.forward(Operator.java:697)
at org.apache.hadoop.hive.ql.exec.SelectOperator.processOp(SelectOperator.java:84)
at org.apache.hadoop.hive.ql.exec.Operator.process(Operator.java:457)
at org.apache.hadoop.hive.ql.exec.Operator.forward(Operator.java:697)
at org.apache.hadoop.hive.ql.exec.ExtractOperator.processOp(ExtractOperator.java:45)
at org.apache.hadoop.hive.ql.exec.Operator.process(Operator.java:457)
at org.apache.hadoop.hive.ql.exec.ExecReducer.reduce(ExecReducer.java:244)
... 7 more
Caused by: java.io.IOException: Cannot run program "/usr/bin/python2.6": java.io.IOException: error=7, Argument list too long
at java.lang.ProcessBuilder.start(ProcessBuilder.java:459)
at org.apache.hadoop.hive.ql.exec.ScriptOperator.processOp(ScriptOperator.java:279)
... 15 more
Caused by: java.io.IOException: java.io.IOException: error=7, Argument list too long
at java.lang.UNIXProcess.(ProcessImpl.java:65)
at java.lang.ProcessBuilder.start(ProcessBuilder.java:452)
... 16 more
2011-03-01 14:46:13,784 INFO org.apache.hadoop.mapred.Task: Runnning cleanup for the task

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categorieshive, hadoop
postedMar 1, '11 at 4:22p
activeMar 2, '11 at 2:54p
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