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yacy_search_server/source/net/yacy/kelondro/table
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Michael Peter Christen c40c302748 when many crawl queues are generated, this NPE can occur; probably 
caused as concurrency issue:
W 2015/09/05 14:09:10 ConcurrentLog java.lang.NullPointerException
java.lang.NullPointerException
	at java.util.TreeMap.rotateRight(TreeMap.java:2239)
	at java.util.TreeMap.fixAfterInsertion(TreeMap.java:2271)
	at java.util.TreeMap.put(TreeMap.java:582)
	at net.yacy.kelondro.table.Table.<init>(Table.java:235)
	at net.yacy.crawler.HostQueue.openStack(HostQueue.java:229)
	at net.yacy.crawler.HostQueue.getStack(HostQueue.java:204)
	at net.yacy.crawler.HostQueue.push(HostQueue.java:397)
	at net.yacy.crawler.HostBalancer.push(HostBalancer.java:237)
	at net.yacy.crawler.data.NoticedURL.push(NoticedURL.java:184)
	at net.yacy.crawler.CrawlStacker.stackCrawl(CrawlStacker.java:355)
	at net.yacy.crawler.CrawlStacker.job(CrawlStacker.java:134)
	at sun.reflect.GeneratedMethodAccessor6.invoke(Unknown Source)
	at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:483)
	at
net.yacy.kelondro.workflow.InstantBlockingThread.job(InstantBlockingThread.java:101)
	at
net.yacy.kelondro.workflow.AbstractBlockingThread.run(AbstractBlockingThread.java:82)
	at
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)
2015-09-05 14:12:17 +02:00
..
ChunkIterator.java fix Crawler HostQueue release of stackfile 2014-07-06 16:04:30 +02:00
IndexTable.java added missing class for latest changes 2014-11-13 01:30:12 +01:00
Relations.java - the webgraph shall store all links which appear on a web page and not 2013-09-15 00:30:23 +02:00
SplitTable.java enhanced timezone managament for indexed data: 2015-04-15 13:17:23 +02:00
SQLTable.java - enhanced postprocessing speed and memory footprint (by using HashMaps 2014-02-28 14:01:09 +01:00
Table.java when many crawl queues are generated, this NPE can occur; probably 2015-09-05 14:12:17 +02:00