Pervasive replication

Sean Cribbs sean at basho.com
Tue Oct 5 12:54:40 EDT 2010


Make sure you set ulimit -n before starting Riak.  A value of 1024 or larger is recommended (on OS/X the default is 256).  Example:

$ ulimit -a
core file size          (blocks, -c) 0
data seg size           (kbytes, -d) unlimited
file size               (blocks, -f) unlimited
max locked memory       (kbytes, -l) unlimited
max memory size         (kbytes, -m) unlimited
open files                      (-n) 256
pipe size            (512 bytes, -p) 1
stack size              (kbytes, -s) 8192
cpu time               (seconds, -t) unlimited
max user processes              (-u) 266
virtual memory          (kbytes, -v) unlimited

$ ulimit -n 1024

This is a common cause of timeouts and connection failures on OS/X.

Sean Cribbs <sean at basho.com>
Developer Advocate
Basho Technologies, Inc.
http://basho.com/

On Oct 5, 2010, at 12:43 PM, Alex Wolfe wrote:

> I've run into a problem with Riak on my development machine, and I can't quite sort out what's happening.  I've tried stopping the riak processes and restarting it back up again, but it will not service any requests.
> 
> Has anyone seen this before?
> 
> 
> $ curl -v -X POST http://riak:8098/riak/test -d'{"foo":"bar"}' -H 'Content-Type:application/json'
> * About to connect() to riak port 8098 (#0)
> *   Trying ::1... Connection refused
> *   Trying fe80::1... Connection refused
> *   Trying 127.0.0.1... connected
> * Connected to riak (127.0.0.1) port 8098 (#0)
>> POST /riak/test HTTP/1.1
>> User-Agent: curl/7.19.7 (universal-apple-darwin10.0) libcurl/7.19.7 OpenSSL/0.9.8l zlib/1.2.3
>> Host: riak:8098
>> Accept: */*
>> Content-Type:application/json
>> Content-Length: 13
>> 
> < HTTP/1.1 500 Internal Server Error
> < Vary: Accept-Encoding
> < Server: MochiWeb/1.1 WebMachine/1.7.1 (participate in the frantic)
> < Location: /riak/test/RmfYZCM8LtBPRu4gqZivu8pfVoh
> < Date: Tue, 05 Oct 2010 16:36:57 GMT
> < Content-Type: text/html
> < Content-Length: 713
> < 
> <html><head><title>500 Internal Server Error</title></head><body><h1>Internal Server Error</h1>The server encountered an error while processing this request:<br><pre>{error,{error,{case_clause,{error,timeout}},
>              [{riak_kv_wm_raw,accept_doc_body,2},
>               {webmachine_resource,resource_call,3},
>               {webmachine_resource,do,3},
>               {webmachine_decision_core,resource_call,1},
>               {webmachine_decision_core,accept_helper,0},
>               {webmachine_decision_core,decision,1},
>               {webmachine_decision_core,handle_request,2},
> * Connection #0 to host riak left intact
> * Closing connection #0
>               {webmachine_mochiweb,loop,1}]}}</pre><P><HR><ADDRESS>mochiweb+webmachine web server</ADDRESS></body></html>
> 
> 
> 
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