Jobrunner log on deployment-jobrunner01 shows repeated occurrences of:
2016-02-13T06:28:39+0000: Runner loop 0 process in slot 4 gave status '0': curl -XPOST -s -a 'http://127.0.0.1:9005/rpc/RunJobs.php?wiki=enwiki&type=cirrusSearchLinksUpdatePrioritized&maxtime=30&maxmem=300M' <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN"> <html><head> <title>503 Service Unavailable</title> </head><body> <h1>Service Unavailable</h1> <p>The server is temporarily unable to service your request due to maintenance downtime or capacity problems. Please try again later.</p> </body></html>
Running manually shows the execution time limit being hit:
$ time curl -XPOST -s -a 'http://127.0.0.1:9005/rpc/RunJobs.php?wiki=enwiki&type=cirrusSearchLinksUpdatePrioritized&maxtime=30&maxmem=300M' <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN"> <html><head> <title>503 Service Unavailable</title> </head><body> <h1>Service Unavailable</h1> <p>The server is temporarily unable to service your request due to maintenance downtime or capacity problems. Please try again later.</p> </body></html> real 2m0.014s user 0m0.022s sys 0m0.007s