Uploaded image for project: 'Nutch'
  1. Nutch
  2. NUTCH-2570

Deduplication job fails to install deduplicated CrawlDb

    XMLWordPrintableJSON

    Details

    • Type: Bug
    • Status: Closed
    • Priority: Critical
    • Resolution: Fixed
    • Affects Version/s: 1.15
    • Fix Version/s: 1.15
    • Component/s: crawldb
    • Labels:
      None

      Description

      The DeduplicationJob ("nutch dedup") fails to install the deduplicated CrawlDb and leaves only the "old" crawldb (if "db.preserve.backup" is true):

      % tree crawldb
      crawldb
      ├── current
      │   └── part-r-00000
      │   ├── data
      │   └── index
      └── old
      └── part-r-00000
      ├── data
      └── index
      % bin/nutch dedup crawldb
      DeduplicationJob: starting at 2018-04-22 21:48:08
      Deduplication: 6 documents marked as duplicates
      Deduplication: Updating status of duplicate urls into crawl db.
      Exception in thread "main" java.io.FileNotFoundException: File file:/tmp/crawldb/1742327020 does not exist
      at org.apache.hadoop.fs.RawLocalFileSystem.deprecatedGetFileStatus(RawLocalFileSystem.java:611)
      at org.apache.hadoop.fs.RawLocalFileSystem.getFileLinkStatusInternal(RawLocalFileSystem.java:824)
      at org.apache.hadoop.fs.RawLocalFileSystem.getFileStatus(RawLocalFileSystem.java:601)
      at org.apache.hadoop.fs.FileUtil.copy(FileUtil.java:337)
      at org.apache.hadoop.fs.FileUtil.copy(FileUtil.java:289)
      at org.apache.hadoop.fs.RawLocalFileSystem.rename(RawLocalFileSystem.java:374)
      at org.apache.hadoop.fs.ChecksumFileSystem.rename(ChecksumFileSystem.java:613)
      at org.apache.nutch.util.FSUtils.replace(FSUtils.java:58)
      at org.apache.nutch.crawl.CrawlDb.install(CrawlDb.java:212)
      at org.apache.nutch.crawl.CrawlDb.install(CrawlDb.java:225)
      at org.apache.nutch.crawl.DeduplicationJob.run(DeduplicationJob.java:366)
      at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
      at org.apache.nutch.crawl.DeduplicationJob.main(DeduplicationJob.java:379)
      
      % tree crawldb
      crawldb
      └── old
      └── part-r-00000
      ├── data
      └── index
      

      In pseudo-distributed mode it's even worse: only the "old" CrawlDb is left without any error.

        Attachments

          Issue Links

            Activity

              People

              • Assignee:
                snagel Sebastian Nagel
                Reporter:
                snagel Sebastian Nagel
              • Votes:
                0 Vote for this issue
                Watchers:
                3 Start watching this issue

                Dates

                • Created:
                  Updated:
                  Resolved: