Hi team,
following query hangs at 99.97% for one reducer, kindly help or point to what
can be cause
drop table if exists sample.dpi_short_lt;create table sample.dpi_short_lt
asselect b.msisdn, a.area_erb,
a.longitude, a.latitude,
substring(b.msisdn,1,2) as country,
substring(b.msisdn,3,2) as area_code,
substring(b.start_time,1,4) as year,
substring(b.start_time,6,2) as month,
substring(b.start_time,9,2) as day,
substring(b.start_time,12,2) as hour,
cast(b.procedure_duration as double) as duracao_ms,
cast(b.internet_latency as double) as int_internet_latency,
cast(b.ran_latency as double) as int_ran_latency,
cast(b.http_latency as double) as int_http_latency,
(case when b.internet_latency='' then 1 else 0 end) as
internet_latency_missing, (case when
b.ran_latency='' then 1 else 0 end) as ran_latency_missing,
(case when b.http_latency='' then 1 else 0 end) as
http_latency_missing, (cast(b.mean_throughput_ul
as int) * cast( procedure_duration as int) / 1000) as total_up_bytes,
(cast(b.mean_throughput_dl as int) *
cast(procedure_duration as int) / 1000) as total_dl_bytes,
cast(b.missing_packets_ul as int) as int_missing_packets_ul,
cast(b.missing_packets_dl as int) as
int_missing_packets_dlfrom sample.dpi_large bleft outer join sample.science_new
aon b.cgi = regexp_replace(a.codigo_cgi_ecgi,'-','')where msisdn!='';
Hive was heuristically selecting 1000 reducers and it was hanging at 99.97
percent on one reduce task. I then changed the above values to 3GB per reducer
and 500 reducers and started hitting this error.
java.lang.RuntimeException: Hive Runtime Error while closing operators: Unable
to rename output from:
hdfs://tlvcluster/tmp/hive-hadoop/hive_2014-03-01_03-14-36_812_8390586541316719852-1/_task_tmp.-ext-10001/_tmp.000003_0
to:
hdfs://tlvcluster/tmp/hive-hadoop/hive_2014-03-01_03-14-36_812_8390586541316719852-1/_tmp.-ext-10001/000003_0
at
org.apache.hadoop.hive.ql.exec.ExecReducer.close(ExecReducer.java:313)
at
org.apache.hadoop.mapred.ReduceTask.runOldReducer(ReduceTask.java:516)
at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:447)
at org.apache.hadoop.mapred.Child$4.run(Child.java:268)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:415)
at
org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1408)
at org.apache.hadoop.mapred.Child.main(Child.java:262)
Caused by: org.apache.hadoop.hive.ql.metadata.HiveException: Unable to rename
output from: hdfs://tlvcluster/tmp/hive-hadoop/hive_2014-03-01_03-14-36_812
I have 22 node cluster running cdh 4.3. Please try to locate what can be teh
issue.
*------------------------*
Cheers !!!
Siddharth Tiwari
Have a refreshing day !!!
"Every duty is holy, and devotion to duty is the highest form of worship of
God.”
"Maybe other people will try to limit me but I don't limit myself"
