Martin Vysny created LUCENE-5855:
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Summary: BinaryDictionary may fail reading a file
Key: LUCENE-5855
URL: https://issues.apache.org/jira/browse/LUCENE-5855
Project: Lucene - Core
Issue Type: Bug
Components: modules/analysis
Affects Versions: 4.9
Reporter: Martin Vysny
The following code may fail on other JVMs, e.g. on Android:
final ByteBuffer tmpBuffer = ByteBuffer.allocateDirect(size);
final ReadableByteChannel channel = Channels.newChannel(dictIS);
final int read = channel.read(tmpBuffer);
if (read != size) {
throw new EOFException("Cannot read whole dictionary");
}
The code expects that channel.read() will fill entire buffer contents, which is
however not the case: ReadableByteChannel.read() may even decide to read 0
bytes and this mimicks InputStream.read() behavior. The current Lucene code
accidentally works on Oracle Java because Oracle Java channel.read() fills the
buffer fully (just check the Channels.newChannel() implementation).
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