SQL Server 2016 R Services: sp_execute_external_script returns 0x80004005 error -

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i run r code after querying 100m records , following error after process runs on 6 hours:

msg 39004, level 16, state 19, line 300 'r' script error occurred during execution of 'sp_execute_external_script'      hresult 0x80004005.

hresult 0x80004005 appears associated in windows connectivity, permissions or "unspecified" error.

i know logging in r code process never reaches r script @ all. know entire procedure completes after 4 minutes on smaller number of records, example, 1m. leads me believe scaling problem or issue data, rather bug in r code. have not included r code or full query proprietary reasons.

however, expect disk or memory error display 0x80004004 out of memory error if case.

one clue noticed in sql errorlog following:

sql server received abort message , abort execution major error : 18  , minor error : 42

however time of log line not coincide interruption of process, although occur after started. unfortunately, there precious little on web "major error 18".

a sql trace when running ssms shows client logging in , logging out every 6 minutes or so, can assume normal keepalive behaviour.

the sanitized sp_execute_external_script call:

      exec sp_execute_external_script                     @language = n'r'                   , @script = n'#we never here                                 #returns name of output data file'                   , @input_data_1 = n'select top 100000000 data'                      , @input_data_1_name = n'x'                   , @output_data_1_name = n'output_file_df'                   result sets ((output_file varchar(100) not null))

server specs: 8 cores 256 gb ram sql server 2016 ctp 3

any ideas, suggestions or debugging hints appreciated!

update: set trace_level=3 in rlauncher.config turn on higher level of logging , re-ran process. log reveals cleanup process ran, removing session files, @ time entire process failed after 6.5 hours.

[2016-05-30 01:35:34.419][00002070][00001ec4][info] sqlsatellite_launchsatellite(1, a187bc64-c349-410b-861e-bfdc714c8017, 1, 49232, nullptr) completed: 00000000

[2016-05-30 01:35:34.420][00002070][00001ec4][info] < sqlsatellite_launchsatellite, dllmain.cpp, 223

[2016-05-30 08:04:02.443][00002070][00001ec4][info] > sqlsatellite_launchercleanup, dllmain.cpp, 309

[2016-05-30 08:04:07.443][00002070][00001ec4][warning] session a187bc64-c349-410b-861e-bfdc714c8017 cleanup wait failed 258 , error 0

[2016-05-30 08:04:07.444][00002070][00001ec4][info] session(a187bc64-c349-410b-861e-bfdc714c8017) logged 2 output files

[2016-05-30 08:04:07.444][00002070][00001ec4][warning] trydeletesinglefile(c:\progra~1\micros~1\mssql1~1.mss\mssql\extens~1\mssqlserver06\a187bc64-c349-410b-861e-bfdc714c8017\rscript1878455a2528) failed 32

[2016-05-30 08:04:07.445][00002070][00001ec4][warning] trydeletesingledirectory(c:\progra~1\micros~1\mssql1~1.mss\mssql\extens~1\mssqlserver06\a187bc64-c349-410b-861e-bfdc714c8017) failed 32

[2016-05-30 08:04:08.446][00002070][00001ec4][info] session a187bc64-c349-410b-861e-bfdc714c8017 removed mssqlserver06 user

[2016-05-30 08:04:08.447][00002070][00001ec4][info] sqlsatellite_launchercleanup(a187bc64-c349-410b-861e-bfdc714c8017) completed: 00000000

it appears way allow long-running process continue to: a) extend job cleanup wait time allow job finish b) disable job cleanup process

i have far been unable find value sets job cleanup wait time in mssqllaunchpad service. while job_cleanup_on_exit flag exists in rlauncher.config, setting 0 has no effect. service seems reset 1 when restarted.

again, suggestions or assistance appreciated!

by default, sql server reads data r memory data frame before starting execution of r script. based on fact script works 1m rows , fails start 100m rows, potentially out of memory error. resolve memory issues, (other increasing memory on machine/reducing data size) can try 1 of these solutions

  1. increase memory allocation r process execution using sys.resource_governor_external_resource_pools max_memory_percent setting. default, sql server limits r process execution 20% of memory.
  2. streaming execution r script instead of loading data memory. note parameter can used in cases output of r script doesn’t depend on reading or looking @ entire set of rows.

the warnings in rlauncher.log data cleanup happened after r script execution can safely ignored , not root cause failures seeing.


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