Christopher Batey commented on CASSANDRA-12237:

Doh! Now it is [~slebresne]

> Cassandra stress graphing is broken
> -----------------------------------
>                 Key: CASSANDRA-12237
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-12237
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Tools
>            Reporter: Christopher Batey
>            Assignee: Christopher Batey
>             Fix For: 3.x
> Cassandra stress relies on a tmp file with the stress output so it can parse 
> it and put it the the graph html.
> However the contents of this file is now broken:
> {code}
> Sleeping 2s...Sleeping 2s...
> Sleeping 2s...
> Warming up WRITE with 50000 iterations...Warming up WRITE with 50000 
> iterations...
> Warming up WRITE with 50000 iterations...
> Running WRITE with 500 threads 10 secondsRunning WRITE with 500 threads 10 
> seconds
> Running WRITE with 500 threads 10 seconds
> ...
> {code}
> This is as we create a {code}MultiPrintStream{code} that inherits from 
> {code}PrintWriter{code} and then delegate the call to super as well as a list 
> of other PrintWriters
> The call to super for println comes back into our print method so every line 
> gets logged multiple times as we do the for (PrintStream s: newStreams) many 
> times.
> We can change this to use composition and use our own interface if we want to 
> use a composite for logging the results
> This results in the parsing of this file not quite working and the aggregate 
> stats not working in produced graphs.

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