Hi, Have you checked your JDBC connections from Spark to Oracle. What is Oracle saying? Is it doing anything or hanging?
set pagesize 9999 set linesize 140 set heading off select SUBSTR(name,1,8) || ' sessions as on '||TO_CHAR(CURRENT_DATE, 'MON DD YYYY HH:MI AM') from v$database; set heading on column spid heading "OS PID" format a6 column process format a13 heading "Client ProcID" column username format a15 column sid format 999 column serial# format 99999 column STATUS format a3 HEADING 'ACT' column last format 9,999.99 column TotGets format 999,999,999,999 HEADING 'Logical I/O' column phyRds format 999,999,999 HEADING 'Physical I/O' column total_memory format 999,999,999 HEADING 'MEM/KB' -- SELECT substr(a.username,1,15) "LOGIN" , substr(a.sid,1,5) || ','||substr(a.serial#,1,5) AS "SID/serial#" , TO_CHAR(a.logon_time, 'DD/MM HH:MI') "LOGGED IN SINCE" , substr(a.machine,1,10) HOST , substr(p.username,1,8)||'/'||substr(p.spid,1,5) "OS PID" , substr(a.osuser,1,8)||'/'||substr(a.process,1,5) "Client PID" , substr(a.program,1,15) PROGRAM --,ROUND((CURRENT_DATE-a.logon_time)*24) AS "Logged/Hours" , ( select round(sum(ss.value)/1024) from v$sesstat ss, v$statname sn where ss.sid = a.sid and sn.statistic# = ss.statistic# and -- sn.name in ('session pga memory') sn.name in ('session pga memory','session uga memory') ) AS total_memory , (b.block_gets + b.consistent_gets) TotGets , b.physical_reads phyRds , decode(a.status, 'ACTIVE', 'Y','INACTIVE', 'N') STATUS , CASE WHEN a.sid in (select sid from v$mystat where rownum = 1) THEN '<-- YOU' ELSE ' ' END "INFO" FROM v$process p ,v$session a ,v$sess_io b WHERE a.paddr = p.addr AND p.background IS NULL --AND a.sid NOT IN (select sid from v$mystat where rownum = 1) AND a.sid = b.sid AND a.username is not null --AND (a.last_call_et < 3600 or a.status = 'ACTIVE') --AND CURRENT_DATE - logon_time > 0 --AND a.sid NOT IN ( select sid from v$mystat where rownum=1) -- exclude me --AND (b.block_gets + b.consistent_gets) > 0 ORDER BY a.username; exit HTH Dr Mich Talebzadeh LinkedIn * https://www.linkedin.com/profile/view?id=AAEAAAAWh2gBxianrbJd6zP6AcPCCdOABUrV8Pw <https://www.linkedin.com/profile/view?id=AAEAAAAWh2gBxianrbJd6zP6AcPCCdOABUrV8Pw>* http://talebzadehmich.wordpress.com *Disclaimer:* Use it at your own risk. Any and all responsibility for any loss, damage or destruction of data or any other property which may arise from relying on this email's technical content is explicitly disclaimed. The author will in no case be liable for any monetary damages arising from such loss, damage or destruction. On Fri, 10 Apr 2020 at 17:37, Ruijing Li <liruijin...@gmail.com> wrote: > Hi all, > > I am on spark 2.4.4 and using scala 2.11.12, and running cluster mode on > mesos. I am ingesting from an oracle database using spark.read.jdbc. I am > seeing a strange issue where spark just hangs and does nothing, not > starting any new tasks. Normally this job finishes in 30 stages but > sometimes it stops at 29 completed stages and doesn’t start the last stage. > The spark job is idling and there is no pending or active task. What could > be the problem? Thanks. > -- > Cheers, > Ruijing Li >