[
https://issues.apache.org/jira/browse/HIVE-22716?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Marta Kuczora updated HIVE-22716:
---------------------------------
Description:
The ParquetFooterInputFromCache.read(ByteBuffer bb) calls the readInternal
method with the result parameter passed as 'len'. The value of the result
parameter will always be -1 at this point, and because of this, the
readInternal method won't read anything.
{noformat}
public int read(ByteBuffer bb) throws IOException {
// Simple implementation for now - currently Parquet uses heap buffers.
int result = -1;
if (bb.hasArray()) {
result = readInternal(bb.array(), bb.arrayOffset(), result); // The
readInternal is called with result=-1
if (result > 0) {
bb.position(bb.position() + result);
}
} else {
byte[] b = new byte[bb.remaining()];
result = readInternal(b, 0, result);
// The readInternal is called with result=-1
bb.put(b, 0, result);
}
return result;
}
{noformat}
{noformat}
public int readInternal(byte[] b, int offset, int len) {
if (position >= length) return -1;
int argPos = offset, argEnd = offset + len; // Here argEnd will be -1
while (argPos < argEnd) { // This condition
will never be true, since argEnd=-1
if (bufferIx == cacheData.length) return (argPos - offset);
ByteBuffer data = cacheData[bufferIx].getByteBufferDup();
int toConsume = Math.min(argEnd - argPos, data.remaining() - bufferPos);
data.position(data.position() + bufferPos);
data.get(b, argPos, toConsume);
if (data.remaining() == 0) {
++bufferIx;
bufferPos = 0;
} else {
bufferPos += toConsume;
}
argPos += toConsume;
}
return len;
}
{noformat}
The read(ByteBuffer bb) method wasn't called before, but in the 1.11.0 Parquet
version, there were some optimizations
(PARQUET-1542|https://issues.apache.org/jira/browse/PARQUET-1542), so this
method is called now. This bug causes the TestMiniLlapCliDriver and
TestMiniLlapLocalCliDriver q tests failing with the new Parquet version.
> Reading to ByteBuffer is broken in ParquetFooterInputFromCache
> --------------------------------------------------------------
>
> Key: HIVE-22716
> URL: https://issues.apache.org/jira/browse/HIVE-22716
> Project: Hive
> Issue Type: Bug
> Components: llap
> Reporter: Marta Kuczora
> Assignee: Marta Kuczora
> Priority: Major
> Fix For: 4.0.0
>
>
> The ParquetFooterInputFromCache.read(ByteBuffer bb) calls the readInternal
> method with the result parameter passed as 'len'. The value of the result
> parameter will always be -1 at this point, and because of this, the
> readInternal method won't read anything.
> {noformat}
> public int read(ByteBuffer bb) throws IOException {
> // Simple implementation for now - currently Parquet uses heap buffers.
> int result = -1;
> if (bb.hasArray()) {
> result = readInternal(bb.array(), bb.arrayOffset(), result); // The
> readInternal is called with result=-1
> if (result > 0) {
> bb.position(bb.position() + result);
> }
> } else {
> byte[] b = new byte[bb.remaining()];
> result = readInternal(b, 0, result);
> // The readInternal is called with result=-1
> bb.put(b, 0, result);
> }
> return result;
> }
> {noformat}
> {noformat}
> public int readInternal(byte[] b, int offset, int len) {
> if (position >= length) return -1;
> int argPos = offset, argEnd = offset + len; // Here argEnd will be -1
> while (argPos < argEnd) { // This
> condition will never be true, since argEnd=-1
> if (bufferIx == cacheData.length) return (argPos - offset);
> ByteBuffer data = cacheData[bufferIx].getByteBufferDup();
> int toConsume = Math.min(argEnd - argPos, data.remaining() - bufferPos);
> data.position(data.position() + bufferPos);
> data.get(b, argPos, toConsume);
> if (data.remaining() == 0) {
> ++bufferIx;
> bufferPos = 0;
> } else {
> bufferPos += toConsume;
> }
> argPos += toConsume;
> }
> return len;
> }
> {noformat}
> The read(ByteBuffer bb) method wasn't called before, but in the 1.11.0
> Parquet version, there were some optimizations
> (PARQUET-1542|https://issues.apache.org/jira/browse/PARQUET-1542), so this
> method is called now. This bug causes the TestMiniLlapCliDriver and
> TestMiniLlapLocalCliDriver q tests failing with the new Parquet version.
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