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HADOOP-10614. CBZip2InputStream is not threadsafe (Xiangrui Meng via Sandy Ryza)

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git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1595521 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Sanford Ryza 2014-05-17 18:04:03 +00:00
parent 461ded8bd4
commit 1e4e98aa35
2 changed files with 12 additions and 7 deletions
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3
hadoop-common-project/hadoop-common/CHANGES.txt
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@ -392,6 +392,9 @@ Release 2.5.0 - UNRELEASED
HADOOP-10609. .gitignore should ignore .orig and .rej files. (kasha)
HADOOP-10614. CBZip2InputStream is not threadsafe (Xiangrui Meng via
Sandy Ryza)
OPTIMIZATIONS
BUG FIXES

16
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/compress/bzip2/CBZip2InputStream.java
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@ -129,7 +129,7 @@ public enum STATE {
private int computedBlockCRC, computedCombinedCRC;
private boolean skipResult = false;// used by skipToNextMarker
private static boolean skipDecompression = false;
private boolean skipDecompression = false;
// Variables used by setup* methods exclusively
@ -281,12 +281,18 @@ private void makeMaps() {
*/
public CBZip2InputStream(final InputStream in, READ_MODE readMode)
throws IOException {
this(in, readMode, false);
}
private CBZip2InputStream(final InputStream in, READ_MODE readMode, boolean skipDecompression)
throws IOException {
super();
int blockSize = 0X39;// i.e 9
this.blockSize100k = blockSize - '0';
this.in = new BufferedInputStream(in, 1024 * 9);// >1 MB buffer
this.readMode = readMode;
this.skipDecompression = skipDecompression;
if (readMode == READ_MODE.CONTINUOUS) {
currentState = STATE.START_BLOCK_STATE;
lazyInitialization = (in.available() == 0)?true:false;
@ -316,11 +322,7 @@ public CBZip2InputStream(final InputStream in, READ_MODE readMode)
*
*/
public static long numberOfBytesTillNextMarker(final InputStream in) throws IOException{
CBZip2InputStream.skipDecompression = true;
CBZip2InputStream anObject = null;
anObject = new CBZip2InputStream(in, READ_MODE.BYBLOCK);
CBZip2InputStream anObject = new CBZip2InputStream(in, READ_MODE.BYBLOCK, true);
return anObject.getProcessedByteCount();
}
@ -397,7 +399,7 @@ public int read(final byte[] dest, final int offs, final int len)
if(skipDecompression){
changeStateToProcessABlock();
CBZip2InputStream.skipDecompression = false;
skipDecompression = false;
}
final int hi = offs + len;