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https://issues.apache.org/jira/browse/HIVE-18149?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16285012#comment-16285012
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Hive QA commented on HIVE-18149:
--------------------------------



Here are the results of testing the latest attachment:
https://issues.apache.org/jira/secure/attachment/12900887/HIVE-18149.02.patch

{color:red}ERROR:{color} -1 due to build exiting with an error

Test results: https://builds.apache.org/job/PreCommit-HIVE-Build/8164/testReport
Console output: https://builds.apache.org/job/PreCommit-HIVE-Build/8164/console
Test logs: http://104.198.109.242/logs/PreCommit-HIVE-Build-8164/

Messages:
{noformat}
Executing org.apache.hive.ptest.execution.TestCheckPhase
Executing org.apache.hive.ptest.execution.PrepPhase
Executing org.apache.hive.ptest.execution.YetusPhase
Executing org.apache.hive.ptest.execution.ExecutionPhase
Tests exited with: ExecutionException: java.util.concurrent.ExecutionException: 
org.apache.hive.ptest.execution.ssh.SSHExecutionException: RSyncResult 
[localFile=/data/hiveptest/logs/PreCommit-HIVE-Build-8164/succeeded/205_UTBatch_service_8_tests,
 remoteFile=/home/hiveptest/104.198.217.87-hiveptest-0/logs/, 
getExitCode()=255, getException()=null, getUser()=hiveptest, 
getHost()=104.198.217.87, getInstance()=0]: 'Warning: Permanently added 
'104.198.217.87' (ECDSA) to the list of known hosts.
receiving incremental file list
./
TEST-205_UTBatch_service_8_tests-TEST-org.apache.hive.service.auth.TestLdapAtnProviderWithMiniDS.xml

              0   0%    0.00kB/s    0:00:00  
         91,994 100%    2.58MB/s    0:00:00 (xfr#1, to-chk=12/14)
TEST-205_UTBatch_service_8_tests-TEST-org.apache.hive.service.auth.ldap.TestCustomQueryFilter.xml

              0   0%    0.00kB/s    0:00:00  
         87,958 100%    2.33MB/s    0:00:00 (xfr#2, to-chk=11/14)
TEST-205_UTBatch_service_8_tests-TEST-org.apache.hive.service.auth.ldap.TestQuery.xml

              0   0%    0.00kB/s    0:00:00  
         87,939 100%    1.22MB/s    0:00:00 (xfr#3, to-chk=10/14)
TEST-205_UTBatch_service_8_tests-TEST-org.apache.hive.service.auth.ldap.TestUserFilter.xml

              0   0%    0.00kB/s    0:00:00  
         87,929 100%    1.22MB/s    0:00:00 (xfr#4, to-chk=9/14)
TEST-205_UTBatch_service_8_tests-TEST-org.apache.hive.service.auth.ldap.TestUserSearchFilter.xml

              0   0%    0.00kB/s    0:00:00  
         88,367 100%  837.82kB/s    0:00:00 (xfr#5, to-chk=8/14)
TEST-205_UTBatch_service_8_tests-TEST-org.apache.hive.service.cli.TestCLIServiceConnectionLimits.xml

              0   0%    0.00kB/s    0:00:00  
         89,238 100%  837.95kB/s    0:00:00 (xfr#6, to-chk=7/14)
TEST-205_UTBatch_service_8_tests-TEST-org.apache.hive.service.cli.TestCLIServiceRestore.xml

              0   0%    0.00kB/s    0:00:00  
         87,707 100%  823.57kB/s    0:00:00 (xfr#7, to-chk=6/14)
TEST-205_UTBatch_service_8_tests-TEST-org.apache.hive.service.cli.TestHiveSQLException.xml

              0   0%    0.00kB/s    0:00:00  
         88,448 100%  822.62kB/s    0:00:00 (xfr#8, to-chk=5/14)
maven-test.txt

              0   0%    0.00kB/s    0:00:00  
          6,086 100%   56.07kB/s    0:00:00 (xfr#9, to-chk=4/14)
logs/
logs/derby.log

              0   0%    0.00kB/s    0:00:00  
            989 100%    9.11kB/s    0:00:00 (xfr#10, to-chk=1/14)
logs/hive.log

              0   0%    0.00kB/s    0:00:00  
     35,487,744   0%   33.84MB/s    0:02:01  
     91,553,792   2%   43.66MB/s    0:01:32  
    148,144,128   3%   47.09MB/s    0:01:24  
    205,651,968   4%   49.04MB/s    0:01:20  
    262,864,896   6%   54.22MB/s    0:01:11  
    319,324,160   7%   54.35MB/s    0:01:10  
    377,126,912   8%   54.63MB/s    0:01:08  Timeout, server 104.198.217.87 not 
responding.

rsync: connection unexpectedly closed (391788893 bytes received so far) 
[receiver]
rsync error: error in rsync protocol data stream (code 12) at io.c(226) 
[receiver=3.1.1]
rsync: connection unexpectedly closed (904 bytes received so far) [generator]
rsync error: unexplained error (code 255) at io.c(226) [generator=3.1.1]
ssh: connect to host 104.198.217.87 port 22: Connection timed out
rsync: connection unexpectedly closed (0 bytes received so far) [Receiver]
rsync error: unexplained error (code 255) at io.c(226) [Receiver=3.1.1]
ssh: connect to host 104.198.217.87 port 22: Connection timed out
rsync: connection unexpectedly closed (0 bytes received so far) [Receiver]
rsync error: unexplained error (code 255) at io.c(226) [Receiver=3.1.1]
ssh: connect to host 104.198.217.87 port 22: Connection timed out
rsync: connection unexpectedly closed (0 bytes received so far) [Receiver]
rsync error: unexplained error (code 255) at io.c(226) [Receiver=3.1.1]
ssh: connect to host 104.198.217.87 port 22: Connection timed out
rsync: connection unexpectedly closed (0 bytes received so far) [Receiver]
rsync error: unexplained error (code 255) at io.c(226) [Receiver=3.1.1]
'
{noformat}

This message is automatically generated.

ATTACHMENT ID: 12900887 - PreCommit-HIVE-Build

> Stats: rownum estimation from datasize underestimates in most cases
> -------------------------------------------------------------------
>
>                 Key: HIVE-18149
>                 URL: https://issues.apache.org/jira/browse/HIVE-18149
>             Project: Hive
>          Issue Type: Sub-task
>          Components: Statistics
>            Reporter: Zoltan Haindrich
>            Assignee: Zoltan Haindrich
>         Attachments: HIVE-18149.01.patch, HIVE-18149.01wip01.patch, 
> HIVE-18149.02.patch
>
>
> rownum estimation is based on the following fact as of now:
> * datasize being used from the following sources:
> ** basicstats aggregates the loaded "on-heap" row sizes ; other readers are 
> able to give "raw size" estimation - I've checked orc; but I'm sure others 
> will do the same....api docs are a bit vague about the methods purpose...
> ** if the basicstats level info is not available; the filesystem level 
> "file-size-sums" are used as the "raw data size" ; which is multiplied by the 
> [deserialization 
> ratio|https://github.com/apache/hive/blob/d9924ab3e285536f7e2cc15ecbea36a78c59c66d/ql/src/java/org/apache/hadoop/hive/ql/stats/StatsUtils.java#L261]
>  ; which is currently 1.
> the problem with all of this is that deser factor is 1; and that rowsize 
> counts in the online object headers..
> example; 20 rows are loaded into a partition 
> [columnstats_partlvl_dp.q|https://github.com/apache/hive/blob/d9924ab3e285536f7e2cc15ecbea36a78c59c66d/ql/src/test/queries/clientpositive/columnstats_partlvl_dp.q#L7]
> after HIVE-18108 [this 
> explain|https://github.com/apache/hive/blob/d9924ab3e285536f7e2cc15ecbea36a78c59c66d/ql/src/test/queries/clientpositive/columnstats_partlvl_dp.q#L25]
>  will estimate the rowsize of the table to be 404 bytes; however the 20 rows 
> of text is only 169 bytes...so it ends up with 0 rows...



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