Tina Shan created HADOOP-17575:
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Summary: Misconfigure buffer size to 0 causing TestDFSIO to hang
in infinite loops
Key: HADOOP-17575
URL: https://issues.apache.org/jira/browse/HADOOP-17575
Project: Hadoop Common
Issue Type: Bug
Affects Versions: 3.3.0
Reporter: Tina Shan
TestDFSIO lacks sanity checks on input buffer size for function doIO()
If misconfigured to 0, doIO() hangs in infinite loops.
{code:java}
public Long doIO(... ) throws IOException {
…..
while (actualSize < totalSize) {
int curSize = in.read(buffer, 0, bufferSize);
if(curSize < 0) break;
actualSize += curSize;
….
}
…
}
{code}
{code:java}
public Long doIO(... ) throws IOException {
…..
for (...; nrRemaining > 0; nrRemaining -= bufferSize) {
If (bufferSize < nrRemaining){ curSize = bufferSize }else{
curSize = (int)nrRemaining
out.write(buffer, 0, curSize);
}
…
}
{code}
Similar parameter _Io.file.buffer.size_ is handled by Java IO library
BufferedInputStream. We suggest adding sanity checks for the benchmark's buffer
size as well.
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