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https://issues.apache.org/jira/browse/LUCENE-1480?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Shai Erera updated LUCENE-1480:
-------------------------------

    Attachment: LUCENE-1480-2.patch

Renamed messagesEnabled to verbose. Thanks Mike !

> Wrap messages output with a check of InfoStream != null
> -------------------------------------------------------
>
>                 Key: LUCENE-1480
>                 URL: https://issues.apache.org/jira/browse/LUCENE-1480
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: Index
>            Reporter: Shai Erera
>            Assignee: Michael McCandless
>            Priority: Minor
>             Fix For: 2.4.1
>
>         Attachments: LUCENE-1480-2.patch, LUCENE-1480.patch
>
>
> I've found several places in the code where messages are output w/o first 
> checking if infoStream != null. The result is that in most of the time, 
> unnecessary strings are created but never output (because infoStream is not 
> set). We should follow Java's logging best practices, where a log message is 
> always output in the following format:
> if (logger.isLoggable(leve)) {
>     logger.log(level, msg);
> }
> Log messages are usually created w/o paying too much attention to performance 
> (such as string concatenation using '+' instead of StringBuffer). Therefore, 
> at runtime it is important to avoid creating those messages, if they will be 
> discarded eventually.
> I will add a method to IndexWriter messagesEnabled() and then use it wherever 
> a call to iw.message() is made.
> Patch will follow

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