java.lang.NullPointerException

JIRA | Michael Stack | 1 decade ago
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    Recovery a fairly large crawl on crawling013, getting following exception: 10/13/2005 01:16:57 +0000 FINE org.archive.crawler.frontier.BdbFrontier put Restoring: 146.145.120.3 10/13/2005 01:16:57 +0000 FINE org.archive.crawler.frontier.BdbFrontier put Restoring: 168.8.216.16 java.lang.NullPointerException at java.util.TreeMap.compare(TreeMap.java:1093) at java.util.TreeMap.put(TreeMap.java:465) at java.util.TreeSet.add(TreeSet.java:210) at java.util.Collections$SynchronizedCollection.add(Collections.java:1581) at org.archive.crawler.frontier.BdbFrontier$4.put(BdbFrontier.java:326) at org.archive.crawler.frontier.BdbFrontier.put(BdbFrontier.java:375) at org.archive.crawler.frontier.BdbFrontier.resurrectOneQueueState(BdbFrontier .java:359) at org.archive.crawler.frontier.BdbFrontier.resurrectQueueState(BdbFrontier.ja va:329) at org.archive.crawler.frontier.BdbFrontier.initQueue(BdbFrontier.java:272) at org.archive.crawler.frontier.WorkQueueFrontier.initialize(WorkQueueFrontier .java:269) at org.archive.crawler.frontier.BdbFrontier.initialize(BdbFrontier.java:467) at org.archive.crawler.framework.CrawlController.setupCrawlModules(CrawlContro ller.java:652) at org.archive.crawler.framework.CrawlController.initialize(CrawlController.ja va:378) at org.archive.crawler.admin.CrawlJob.startCrawling(CrawlJob.java:777) at org.archive.crawler.admin.CrawlJobHandler.startNextJobInternal(CrawlJobHand ler.java:1120) at org.archive.crawler.admin.CrawlJobHandler$2.run(CrawlJobHandler.java:1103) at java.lang.Thread.run(Thread.java:595) Later adding asserts, I see that for the key '146.145.120.3', there is not item in allqueues: Exception in thread "StartNextJob" java.lang.AssertionError: null is null: 146.145.120.3 at org.archive.crawler.frontier.BdbFrontier.put(BdbFrontier.java:374) at org.archive.crawler.frontier.BdbFrontier.resurrectOneQueueState(BdbFrontier .java:354) at org.archive.crawler.frontier.BdbFrontier.resurrectQueueState(BdbFrontier.ja va:329) at org.archive.crawler.frontier.BdbFrontier.initQueue(BdbFrontier.java:272) at org.archive.crawler.frontier.WorkQueueFrontier.initialize(WorkQueueFrontier .java:269) at org.archive.crawler.frontier.BdbFrontier.initialize(BdbFrontier.java:467) at org.archive.crawler.framework.CrawlController.setupCrawlModules(CrawlContro ller.java:652) at org.archive.crawler.framework.CrawlController.initialize(CrawlController.ja va:378) at org.archive.crawler.admin.CrawlJob.startCrawling(CrawlJob.java:777) at org.archive.crawler.admin.CrawlJobHandler.startNextJobInternal(CrawlJobHand ler.java:1120) at org.archive.crawler.admin.CrawlJobHandler$2.run(CrawlJobHandler.java:1103) at java.lang.Thread.run(Thread.java:595)

    JIRA | 1 decade ago | Michael Stack
    java.lang.NullPointerException

    Root Cause Analysis

    1. java.lang.NullPointerException

      No message provided

      at java.util.TreeMap.compare()
    2. Java RT
      Collections$SynchronizedCollection.add
      1. java.util.TreeMap.compare(TreeMap.java:1093)
      2. java.util.TreeMap.put(TreeMap.java:465)
      3. java.util.TreeSet.add(TreeSet.java:210)
      4. java.util.Collections$SynchronizedCollection.add(Collections.java:1581)
      4 frames
    3. org.archive.crawler
      CrawlJobHandler$2.run
      1. org.archive.crawler.frontier.BdbFrontier$4.put(BdbFrontier.java:326)
      2. org.archive.crawler.frontier.BdbFrontier.put(BdbFrontier.java:375)
      3. org.archive.crawler.frontier.BdbFrontier.resurrectOneQueueState(BdbFrontier.java:359)
      4. org.archive.crawler.frontier.BdbFrontier.resurrectQueueState(BdbFrontier.java:329)
      5. org.archive.crawler.frontier.BdbFrontier.initQueue(BdbFrontier.java:272)
      6. org.archive.crawler.frontier.WorkQueueFrontier.initialize(WorkQueueFrontier.java:269)
      7. org.archive.crawler.frontier.BdbFrontier.initialize(BdbFrontier.java:467)
      8. org.archive.crawler.framework.CrawlController.setupCrawlModules(CrawlController.java:652)
      9. org.archive.crawler.framework.CrawlController.initialize(CrawlController.java:378)
      10. org.archive.crawler.admin.CrawlJob.startCrawling(CrawlJob.java:777)
      11. org.archive.crawler.admin.CrawlJobHandler.startNextJobInternal(CrawlJobHandler.java:1120)
      12. org.archive.crawler.admin.CrawlJobHandler$2.run(CrawlJobHandler.java:1103)
      12 frames
    4. Java RT
      Thread.run
      1. java.lang.Thread.run(Thread.java:595)
      1 frame