HDFS-2541. For a sufficiently large value of blocks, the DN Scanner may request a random number with a negative seed value. Contributed by Harsh J
git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1204114 13f79535-47bb-0310-9956-ffa450edef68
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@ -133,6 +133,9 @@ Release 0.23.1 - UNRELEASED
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BUG FIXES
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HDFS-2541. For a sufficiently large value of blocks, the DN Scanner
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may request a random number with a negative seed value. (harsh)
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Release 0.23.0 - 2011-11-01
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INCOMPATIBLE CHANGES
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@ -34,7 +34,6 @@ import java.util.Date;
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import java.util.HashMap;
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import java.util.Iterator;
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import java.util.List;
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import java.util.Random;
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import java.util.TreeSet;
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import java.util.regex.Matcher;
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import java.util.regex.Pattern;
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@ -252,8 +251,9 @@ class BlockPoolSliceScanner {
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*/
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long period = Math.min(scanPeriod,
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Math.max(blockMap.size(),1) * 600 * 1000L);
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int periodInt = Math.abs((int)period);
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return System.currentTimeMillis() - scanPeriod +
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DFSUtil.getRandom().nextInt((int)period);
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DFSUtil.getRandom().nextInt(periodInt);
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}
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/** Adds block to list of blocks */
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