John Doe created HDFS-13514:
-------------------------------
Summary: BenchmarkThroughput.readLocalFile hangs with
misconfigured BUFFER_SIZE
Key: HDFS-13514
URL: https://issues.apache.org/jira/browse/HDFS-13514
Project: Hadoop HDFS
Issue Type: Bug
Components: test
Affects Versions: 2.5.0
Reporter: John Doe
When the BUFFER_SIZE is configured to be 0, the while loop in
BenchmarkThroughput.readLocalFile function hangs endlessly.
This is because when the data.size (i.e., BUFFER_SIZE) is 0, the val will
always be 0 by invoking val=in.read(data).
Here is the code snippet.
{code:java}
BUFFER_SIZE = conf.getInt("dfsthroughput.buffer.size", 4 * 1024);//when
dfsthroughput.buffer.size is configued to be 0
private void readLocalFile(Path path, String name, Configuration conf) throws
IOException {
System.out.print("Reading " + name);
resetMeasurements();
InputStream in = new FileInputStream(new File(path.toString()));
byte[] data = new byte[BUFFER_SIZE];
long size = 0;
while (size >= 0) {
size = in.read(data);
}
in.close();
printMeasurements();
}
{code}
The similar case is HDFS-13513
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