question Re: Morphlines and multithreading in Archives of Support Questions (Read Only)

Morphlines and multithreading

PNS — Thu, 16 Oct 2014 22:30:24 GMT

Hi...

Does the single-threaded design of morphilnes mean that there can be concurrency issues by creating multiple morphlines from the same config file and running each of them in a separate thread?

For example, if one compiles 10 morphlines from the same config file and then run each of those in a separate thread, can that cause any thread safety issues?

Thanks.

Re: Morphlines and multithreading

whosch — Fri, 17 Oct 2014 07:02:15 GMT

bq. For example, if one compiles 10 morphlines from the same config file and then run each of those in a separate thread, can that cause any thread safety issues?

There?s no thread safety issue when doing that. (And there?s minimal contention as well, which improves throughput). In fact, that?s exactly what the hbase-indexer does in order to take advantage of multiple CPU cores, and that?s also what users of the Flume Morphline Solr Sink sometimes do.

Wolfgang.

Re: Morphlines and multithreading

PNS — Fri, 17 Oct 2014 08:04:40 GMT

I assumed so, but wanted to confirm that there is no state sharing "behind the scenes", especially in the Command building process.

Thanks for the confirmation.