If there is a failure in my php code in one of the shell bolts exec process, the error isn't obvious in all the cases when the topology comes up /handles the request.
Only in certain types of failures I see my exceptions getting printed but for some, it just doesnt do anything. here is a simple example: this is part of my code in my shell_bolt.php under multilang/resources: try { ..... ..... $fh = fopen("/tmp/pytrace.txt", 'a') or die("Can't open file"); fwrite($fh, "hello world"); fwrite($fh,print_r($tuple->values)); fclose($fh); $this->emit(array($tuple->values[0], $word)); } catch (Exception $e) { throw new Exception("exception " . $e); } the problem area is print_r() function. If I remove print_r() and just print $tuple->values, everything works fine and the shell bolt emits the word. With print_r, it just hangs and my drpc calls timeout . What is the best way to figure out what is going on with the shell bolt exec process?? thanks!! On , adiya n <nadiya2...@yahoo.com> wrote: Should have looked at the wiki/links better. Troubleshooting guide helped. thanks! On Wednesday, June 4, 2014 11:29 PM, adiya n <nadiya2...@yahoo.com> wrote: Hello all, What do negative id values mean in the logs? Does that indicate any error? I got these while running a local topology. Also, is there any good documentation about understanding the logs. Most of it is self-explanatory from the log messages but if there is any existing documentation somewhere, that will really help. 5433 [Thread-19] INFO backtype.storm.daemon.executor - Processing received message source: prepare-request:7, stream: default, id: {-4212877050522192524=6354306792350206104}, [3323165896464350833, 33] Tuple received by bolt is source: prepare-request:7, stream: default, id: {-4212877050522192524=6354306792350206104}, [3323165896464350833, 33] 5433 [Thread-10] INFO backtype.storm.daemon.worker - Worker 445b9038-ac6f-4629-a86f-82cd5eecf0e3 for storm drpc-demo-1-1401943429 on 9b5a127d-1a02-4362-883e-f5193c6f7a92:4 has finished loading 5434 [Thread-36] INFO backtype.storm.daemon.executor - Processing received message source: spout:8, stream: __ack_init, id: {}, [-4212877050522192524 -4291234877071288404 8] 5434 [Thread-19] INFO backtype.storm.daemon.task - Emitting: bolt0 default [3323165896464350833, MyBolt is emitting: ] 5434 [Thread-36] INFO backtype.storm.daemon.executor - Processing received message source: prepare-request:7, stream: __ack_ack, id: {}, [-4212877050522192524 340043085440436800] 5435 [Thread-19] INFO backtype.storm.daemon.task - Emitting: bolt0 __ack_ack [-4212877050522192524 5906040704921991109] thanks Aiya