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Posted to dev@nutch.apache.org by "Chris A. Mattmann (JIRA)" <ji...@apache.org> on 2006/07/25 23:56:15 UTC
[jira] Updated: (NUTCH-258) Once Nutch logs a SEVERE log item,
Nutch fails forevermore
[ http://issues.apache.org/jira/browse/NUTCH-258?page=all ]
Chris A. Mattmann updated NUTCH-258:
------------------------------------
Fix Version/s: 0.8-dev
> Once Nutch logs a SEVERE log item, Nutch fails forevermore
> ----------------------------------------------------------
>
> Key: NUTCH-258
> URL: http://issues.apache.org/jira/browse/NUTCH-258
> Project: Nutch
> Issue Type: Bug
> Components: fetcher
> Affects Versions: 0.8-dev
> Environment: All
> Reporter: Scott Ganyo
> Assigned To: Chris A. Mattmann
> Priority: Critical
> Fix For: 0.8-dev
>
> Attachments: dumbfix.patch, NUTCH-258.Mattmann.060906.patch.txt
>
>
> Once a SEVERE log item is written, Nutch shuts down any fetching forevermore. This is from the run() method in Fetcher.java:
> public void run() {
> synchronized (Fetcher.this) {activeThreads++;} // count threads
>
> try {
> UTF8 key = new UTF8();
> CrawlDatum datum = new CrawlDatum();
>
> while (true) {
> if (LogFormatter.hasLoggedSevere()) // something bad happened
> break; // exit
>
> Notice the last 2 lines. This will prevent Nutch from ever Fetching again once this is hit as LogFormatter is storing this data as a static.
> (Also note that "LogFormatter.hasLoggedSevere()" is also checked in org.apache.nutch.net.URLFilterChecker and will disable this class as well.)
> This must be fixed or Nutch cannot be run as any kind of long-running service. Furthermore, I believe it is a poor decision to rely on a logging event to determine the state of the application - this could have any number of side-effects that would be extremely difficult to track down. (As it has already for me.)
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