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HBASE-16694 Reduce garbage for onDiskChecksum in HFileBlock (binlijin)

This commit is contained in:
Andrew Purtell 2016-09-26 13:49:10 -07:00
parent f06c0060aa
commit b9ec59ebbe
1 changed files with 5 additions and 3 deletions
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6
hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/HFileBlock.java
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@ -35,10 +35,10 @@ import org.apache.hadoop.hbase.Cell;
import org.apache.hadoop.hbase.HConstants;
import org.apache.hadoop.hbase.classification.InterfaceAudience;
import org.apache.hadoop.hbase.fs.HFileSystem;
import org.apache.hadoop.hbase.io.FSDataInputStreamWrapper;
import org.apache.hadoop.hbase.io.ByteArrayOutputStream;
import org.apache.hadoop.hbase.io.ByteBuffInputStream;
import org.apache.hadoop.hbase.io.ByteBufferSupportDataOutputStream;
import org.apache.hadoop.hbase.io.FSDataInputStreamWrapper;
import org.apache.hadoop.hbase.io.encoding.DataBlockEncoding;
import org.apache.hadoop.hbase.io.encoding.HFileBlockDecodingContext;
import org.apache.hadoop.hbase.io.encoding.HFileBlockDefaultDecodingContext;
@ -870,7 +870,7 @@ public class HFileBlock implements Cacheable {
* part of onDiskBytesWithHeader. If data is uncompressed, then this
* variable stores the checksum data for this block.
*/
private byte[] onDiskChecksum;
private byte[] onDiskChecksum = HConstants.EMPTY_BYTE_ARRAY;
/**
* Valid in the READY state. Contains the header and the uncompressed (but
@ -1039,7 +1039,9 @@ public class HFileBlock implements Cacheable {
onDiskBlockBytesWithHeader.length + numBytes,
uncompressedBlockBytesWithHeader.length, onDiskBlockBytesWithHeader.length);
}
if (onDiskChecksum.length != numBytes) {
onDiskChecksum = new byte[numBytes];
}
ChecksumUtil.generateChecksums(
onDiskBlockBytesWithHeader, 0, onDiskBlockBytesWithHeader.length,
onDiskChecksum, 0, fileContext.getChecksumType(), fileContext.getBytesPerChecksum());