Weichen Ye created HBASE-12716:
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Summary: A bug in RegionSplitter.UniformSplit algorithm
Key: HBASE-12716
URL: https://issues.apache.org/jira/browse/HBASE-12716
Project: HBase
Issue Type: Bug
Components: regionserver
Affects Versions: 0.98.6
Reporter: Weichen Ye
I`m working for another issues HBASE-12590 and trying to use the UniformSplit
algorithm in RegionSplitter. When the last bytes of start key and end key are
adjacent in alphabetical order or ASCII order, the UniformSplit algorithm meet
an NPE.
Like startkey: aaa, endkey :aab
startkey:1111 endkey: 1112
For example, we write this simple test code:
import org.apache.hadoop.hbase.util.RegionSplitter.UniformSplit;
......
byte[] a1 = { 'a', 'a', 'a' };
byte[] a2 = { 'a', 'a', 'b' };
UniformSplit us = new UniformSplit();
byte[] mid = us.split(a1, a2);
for (byte b : mid) {
System.out.print(b + " ");
}
System.out.println("\n" + new String(mid));
We will get the ERROR:
Exception in thread "main" java.lang.NullPointerException
at
org.apache.hadoop.hbase.util.RegionSplitter$UniformSplit.split(RegionSplitter.java:986)
at test.ByteMid.main(ByteMid.java:196)
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