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[HADOOP-7652] Provide a mechanism for a client Hadoop configuration to 'poison' daemon startup; i.e., disallow daemon start up on a client config. - Hadoop - [issue]
...We've seen folks who have been given Hadoop configuration to act as a client accidentally type "hadoop namenode" and get things into a confused, or incorrect state.  Most recently, we'v...
http://issues.apache.org/jira/browse/HADOOP-7652    Author: Philip Zeyliger, 2015-03-09, 15:19
[MAPREDUCE-207] Computing Input Splits on the MR Cluster - MapReduce - [issue]
...Instead of computing the input splits as part of job submission, Hadoop could have a separate "job task type" that computes the input splits, therefore allowing that computation to happen on...
http://issues.apache.org/jira/browse/MAPREDUCE-207    Author: Philip Zeyliger, 2015-02-09, 21:41
[HADOOP-5687] Hadoop NameNode throws NPE if fs.default.name is the default value - Hadoop - [issue]
...Throwing NPE is confusing; instead, an exception with a useful string description could be thrown instead....
http://issues.apache.org/jira/browse/HADOOP-5687    Author: Philip Zeyliger, 2015-01-26, 22:47
[IMPALA-1682] Support '\G' in shell - Impala - [issue]
...MySQL has a feature \G to return query results in the transform, with one column per line, like so:mysql> select * from tests limit 1 \G*************************** 1. row ****************...
http://issues.cloudera.org/browse/IMPALA-1682    Author: Philip Zeyliger, 2015-01-22, 19:25
[IMPALA-1681] Support 'pager' in shell - Impala - [issue]
...MySQL has a feature, called pager for sending results through a command, like so:mysql> pager grep func;PAGER set to 'grep func'mysql> select * from tests limit 1 \G    ...
http://issues.cloudera.org/browse/IMPALA-1681    Author: Philip Zeyliger, 2015-01-22, 19:24
Re: Python avro performance - Avro - [mail # user]
...If I recall correctly, the Python write implementation does a recursivepass to check the data against the schema.  This is sometimes necessary tochoose which branch of a union to take w...
   Author: Philip Zeyliger, 2015-01-10, 00:39
[IMPALA-60] Significant performance difference for count(*) vs count(x) in wide table - Impala - [issue]
...I have a table with 101 columns stored as a snappy-compressed sequence file delimited by ^A.  [localhost:21000] > select count(*) from my_table;Query: select count(*) from my_tableQu...
http://issues.cloudera.org/browse/IMPALA-60    Author: Philip Zeyliger, 2014-11-25, 07:11
[AVRO-1610] HttpTransceiver.java allocates arbitrary amount of memory - Avro - [issue]
...In HttpTransceiver.java, Avro does:      int length = (in.read()<<24)+(in.read()<<16)+(in.read()<<8)+in.read();      if (length == 0...
http://issues.apache.org/jira/browse/AVRO-1610    Author: Philip Zeyliger, 2014-11-25, 05:49
[BIGTOP-872] Separate docs into doc packages - Bigtop - [issue]
...Hadoop projects turn out to use a non-trivial amount of disk space in /usr/share/doc.  When the packages are decompressed onto the file system, the docs tend to eat up 30% or so of the ...
http://issues.apache.org/jira/browse/BIGTOP-872    Author: Philip Zeyliger, 2014-09-06, 08:10
[HADOOP-6241] Script to split configurations from one file into multiple, according to templates. - Hadoop - [issue]
...This script moves properties from hadoop-site.xml into common-site, mapred-site, and hdfs-site in a reasonably generic way.  This is useful for upgrading clusters from 0.18 to 0.20 and ...
http://issues.apache.org/jira/browse/HADOOP-6241    Author: Philip Zeyliger, 2014-07-23, 21:43
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NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB