Node --prof with aerospike can't start

Client Libraries Node.js Client
1

if i use --prof parameter to profiling my code, for example: node --prof app.js i got error from aerospike client module: ERROR(12629) [connect.cc:69] [Connect] - Connecting to Cluster Failed {“code”:-1,“message”:“Failed to seed cluster”,“func”:“as_cluster_seed_nodes”,“file”:“src/main/aerospike/as_clust er.c”,“line”:319}

if start without profiling mode, all ok. Client version 1.0.54

2

Hi Dmitry,

I am able to reproduce the issue with the included example applications as well:

With --prof:

$ node --prof -- get test --log-level 5
Jan 11 2016 03:43:31 UTC: TRACE(43063) [conversions.cc:81] [config_from_jsobject] - host[0].addr = "127.0.0.1"
Jan 11 2016 03:43:31 UTC: TRACE(43063) [conversions.cc:90] [config_from_jsobject] - host[0].port = 3000
Jan 11 2016 03:43:31 UTC: DEBUG(43063) [conversions.cc:198] [config_from_jsobject] - Parsing global policies : Done
Jan 11 2016 03:43:31 UTC: DEBUG(43063) [client.cc:129] [New] - Aerospike object initialization : success
Jan 11 2016 03:43:31 UTC: ERROR(43063) [connect.cc:69] [Connect] - Connecting to Cluster Failed

Without --prof:

$ node get test --log-level 5
Jan 11 2016 03:43:39 UTC: TRACE(43089) [conversions.cc:81] [config_from_jsobject] - host[0].addr = "127.0.0.1"
Jan 11 2016 03:43:39 UTC: TRACE(43089) [conversions.cc:90] [config_from_jsobject] - host[0].port = 3000
Jan 11 2016 03:43:39 UTC: DEBUG(43089) [conversions.cc:198] [config_from_jsobject] - Parsing global policies : Done
Jan 11 2016 03:43:39 UTC: DEBUG(43089) [client.cc:129] [New] - Aerospike object initialization : success
Jan 11 2016 03:43:39 UTC: DEBUG(43089) [connect.cc:75] [Connect] - Connecting to Cluster: Success
...

If you don’t mind, can you please file a new issue on Github. I will continue to look into the problem and will provide you with an update when it can be fixed.

Cheers, Jan

3

Hi Dmitry,

The problem is caused by the timer signals generated by the V8 profiler to collect samples. These SIGPROF interrupts cause some I/O operations in the client to return EINTR errors which are currently not handled correctly. The client should attempt to resume the I/O operations but returns an error to the application instead.

This needs to be fixed in the aerospike C client library which is used by the aerospike Node.js client internally. There is unfortunately no work-around available at the moment. I’ll keep you posted once I know when we will be able to release a fixed client version.

Cheers, Jan

4

Jan, thanks for you answer. I think it’s very important to fix. Waiting for response…

5

Dmitry, just a quick update: A fix was committed to the C client repository. Once an updated C client release is available, I will update the Node.js client as well. I expect that we will have a new Node.js client release next week.

1 Like
6

Dmitry, aerospike@1.0.55 is now available on npmjs.org. It includes the latest C client version which fixes the issue with interrupts. You should be able to run your application using node --prof now and should no longer see any connection issues. Please give it a try and let me know if there are still any problems when running under the profiler.

7

Very thanks! now working fine with --prof parametr :slight_smile: