zhaoyim commented on a change in pull request #746: HBASE-23195
FSDataInputStreamWrapper unbuffer can NOT invoke the clas…
URL: https://github.com/apache/hbase/pull/746#discussion_r341443171
##########
File path:
hbase-server/src/main/java/org/apache/hadoop/hbase/io/FSDataInputStreamWrapper.java
##########
@@ -270,39 +269,23 @@ public void unbuffer() {
if (this.instanceOfCanUnbuffer == null) {
// To ensure we compute whether the stream is instance of CanUnbuffer
only once.
this.instanceOfCanUnbuffer = false;
- Class<?>[] streamInterfaces = streamClass.getInterfaces();
- for (Class c : streamInterfaces) {
- if
(c.getCanonicalName().toString().equals("org.apache.hadoop.fs.CanUnbuffer")) {
- try {
- this.unbuffer = streamClass.getDeclaredMethod("unbuffer");
- } catch (NoSuchMethodException | SecurityException e) {
- if (isLogTraceEnabled) {
- LOG.trace("Failed to find 'unbuffer' method in class " +
streamClass
- + " . So there may be a TCP socket connection "
- + "left open in CLOSE_WAIT state.", e);
- }
- return;
- }
- this.instanceOfCanUnbuffer = true;
- break;
- }
+ if (CanUnbuffer.class.isAssignableFrom(streamClass)) {
+ this.unbuffer = (CanUnbuffer) wrappedStream;
+ this.instanceOfCanUnbuffer = true;
}
}
if (this.instanceOfCanUnbuffer) {
try {
- this.unbuffer.invoke(wrappedStream);
- } catch (IllegalAccessException | IllegalArgumentException |
InvocationTargetException e) {
+ this.unbuffer.unbuffer();
+ } catch (UnsupportedOperationException e){
Review comment:
@Apache9 If a stream NOT implements CanUnbuffer the
`this.unbuffer.unbuffer();` will throw UnsupportedOperationException such as
BufferedFSInputStream. The easy way to check is remove the catch exception code
and run UT `org.apache.hadoop.hbase.io.hfile.TestHFile`, then you can get the
UnsupportedOperationException.
----------------------------------------------------------------
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
For queries about this service, please contact Infrastructure at:
[email protected]
With regards,
Apache Git Services
