Github user srowen commented on a diff in the pull request:
https://github.com/apache/spark/pull/15408#discussion_r83040126
--- Diff:
core/src/main/java/org/apache/spark/io/NioBufferedFileInputStream.java ---
@@ -72,30 +74,35 @@ private boolean refill() throws IOException {
}
@Override
- public int read() throws IOException {
+ public synchronized int read() throws IOException {
if (!refill()) {
return -1;
}
return byteBuffer.get() & 0xFF;
}
@Override
- public int read(byte[] b, int offset, int len) throws IOException {
+ public synchronized int read(byte[] b, int offset, int len) throws
IOException {
if (!refill()) {
return -1;
}
+ if ((offset | len | (offset + len) | (b.length - (offset + len))) < 0)
{
--- End diff --
I think this must be a typo... this is a bitwise-or of a bunch of ints. I
think maybe the example was given as a sort of pseudo code. offset and len
can't be negative and their sum shouldn't exceed the array lenght, but that
seems like it. 'else' below isn't really needed, but that's a nit. Actually,
you want to check whether len is after updating on line 94 right? if no data is
available you also return 0 without a no-op read?
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