ShiXing created HBASE-6520:
------------------------------
Summary: MSLab May cause the Bytes.toLong does not work correctly
for increment
Key: HBASE-6520
URL: https://issues.apache.org/jira/browse/HBASE-6520
Project: HBase
Issue Type: Bug
Reporter: ShiXing
Assignee: ShiXing
When use MemStoreLAB, the KeyValues will share the byte array allocated by the
MemStoreLAB, all the KeyValues' "bytes" attributes are the same byte array.
When use the functions such as Bytes.toLong(byte[] bytes, int offset):
{code}
public static long toLong(byte[] bytes, int offset) {
return toLong(bytes, offset, SIZEOF_LONG);
}
public static long toLong(byte[] bytes, int offset, final int length) {
if (length != SIZEOF_LONG || offset + length > bytes.length) {
throw explainWrongLengthOrOffset(bytes, offset, length, SIZEOF_LONG);
}
long l = 0;
for(int i = offset; i < offset + length; i++) {
l <<= 8;
l ^= bytes[i] & 0xFF;
}
return l;
}
{code}
If we do not put a long value to the KeyValue, and read it as a long value in
HRegion.increment(),the check
{code}
offset + length > bytes.length
{code}
will take no effects, because the bytes.length is not equal to
keyLength+valueLength, indeed it is MemStoreLAB chunkSize which is default 2048
* 1024.
I will paste the patch later.
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