lidavidm commented on a change in pull request #9147:
URL: https://github.com/apache/arrow/pull/9147#discussion_r555809311
##########
File path:
java/flight/flight-core/src/main/java/org/apache/arrow/flight/ArrowMessage.java
##########
@@ -259,7 +259,8 @@ private static ArrowMessage frame(BufferAllocator
allocator, final InputStream s
ArrowBuf body = null;
ArrowBuf appMetadata = null;
while (stream.available() > 0) {
- int tag = readRawVarint32(stream);
+ int tag = readRawVarint32WithEOFCheck(stream);
+
switch (tag) {
Review comment:
That's not true, though, since readRawVarint32WithEOFCheck has a branch
that returns -1.
##########
File path:
java/flight/flight-core/src/main/java/org/apache/arrow/flight/ArrowMessage.java
##########
@@ -332,6 +333,23 @@ private static ArrowMessage frame(BufferAllocator
allocator, final InputStream s
}
+ /**
+ * Get first byte with EOF check, it is especially needed when using grpc
compression.
+ * InflaterInputStream need another read to change reachEOF after all bytes
has been read.
+ *
+ * @param is InputStream
+ * @return -1 if stream is not available, otherwise it will return the
actual value.
+ * @throws IOException Read first byte failed.
+ */
+ private static int readRawVarint32WithEOFCheck(InputStream is) throws
IOException {
+ int firstByte = is.read();
+ if (is.available() <= 0) {
+ return -1;
+ } else {
+ return CodedInputStream.readRawVarint32(firstByte, is);
+ }
+ }
+
private static int readRawVarint32(InputStream is) throws IOException {
int firstByte = is.read();
Review comment:
I'm not sure what you mean - if is.read() returns -1, the stream is at
EOF, so there's never any more data to read.
I also mean, we should consolidate readRawVarint32 and
readRawVarint32WithEOFCheck since there's never any reason to proceed if we're
at EOF, and furthermore, CodedInputStream#readRawVarint32(int, InputStream)
itself doesn't do an EOF check (it assumes the caller has).
##########
File path:
java/flight/flight-core/src/main/java/org/apache/arrow/flight/ArrowMessage.java
##########
@@ -332,6 +333,23 @@ private static ArrowMessage frame(BufferAllocator
allocator, final InputStream s
}
+ /**
+ * Get first byte with EOF check, it is especially needed when using grpc
compression.
+ * InflaterInputStream need another read to change reachEOF after all bytes
has been read.
+ *
+ * @param is InputStream
+ * @return -1 if stream is not available, otherwise it will return the
actual value.
+ * @throws IOException Read first byte failed.
+ */
+ private static int readRawVarint32WithEOFCheck(InputStream is) throws
IOException {
+ int firstByte = is.read();
Review comment:
That would be an incorrect InputStream implementation, since
InputStream.read() == -1 is defined to be EOF - there should be no data left.
##########
File path:
java/flight/flight-core/src/main/java/org/apache/arrow/flight/ArrowMessage.java
##########
@@ -332,6 +333,23 @@ private static ArrowMessage frame(BufferAllocator
allocator, final InputStream s
}
+ /**
+ * Get first byte with EOF check, it is especially needed when using grpc
compression.
+ * InflaterInputStream need another read to change reachEOF after all bytes
has been read.
+ *
+ * @param is InputStream
+ * @return -1 if stream is not available, otherwise it will return the
actual value.
+ * @throws IOException Read first byte failed.
+ */
+ private static int readRawVarint32WithEOFCheck(InputStream is) throws
IOException {
+ int firstByte = is.read();
Review comment:
Furthermore, available() is defined to be an estimate; available() == 0
doesn't mean EOF.
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