Re: Socket InputStream.available may return a positive value after shutdown
δΊ 2011-1-26 20:32, Alan Bateman ει: Jing LV wrote: Hello, I am using java.net.Socket and find an strange behaviour. If Socket inputstream is shutdown, and there was still some data remaining, its available() method may still return a positive value. I checked with the java spec, and the document of Socket.shutdownInput() said: "Places the input stream for this socket at "end of stream". Any data sent to the input stream side of the socket is acknowledged and then silently discarded. If you read from a socket input stream after invoking shutdownInput() on the socket, the stream will return EOF. " What's more, as I check inputStream.read(), it return a EOF, So I guess it would not be correct if available return a positive value. I agree this needs to be looked at and I've created a bug to track it: 7014860: Socket.getInputStream().available() not clear for case that connection is shutdown for reading (should be available on bugs.sun.com within 24h). As it stands the behavior is highly platform specific. Solaris's ioctl(FIONREAD) does return 0 when the connection has been shutdown for reading. Linux continues to return the number of bytes in the socket buffer, as does Windows. There may be alternative SocketImpls that do something different. Minimally, Socket#getInputStream and Socket#shutdownInput should be clarified to make it clear what the expected behavior is, even if is platform specific. -Alan Thanks Alan! I try to follow this issue but has no luck on bugs.sun.com with the number 7014860. Am I miss something? -- Best Regards, Jimmy, Jing LV
Re: Socket InputStream.available may return a positive value after shutdown
Jing LV wrote: Thanks Alan! I try to follow this issue but has no luck on bugs.sun.com with the number 7014860. Am I miss something? I suspect there is a problem on bugs.sun.com as it doesn't seem to be showing any bugs. I noticed a "maintenance in progress" (or a message to that effect )a few days ago so maybe something is broken. Let me see if I can find out. -Alan.
hg: jdk7/tl/jdk: 7017901: OOME in java/util/concurrent/BlockingQueue/CancelledProducerConsumerLoops.java
Changeset: 15ef6cf616d6 Author:chegar Date: 2011-02-17 09:56 + URL: http://hg.openjdk.java.net/jdk7/tl/jdk/rev/15ef6cf616d6 7017901: OOME in java/util/concurrent/BlockingQueue/CancelledProducerConsumerLoops.java Summary: Unbounded queues should be disabled in the test Reviewed-by: alanb ! test/java/util/concurrent/BlockingQueue/CancelledProducerConsumerLoops.java
hg: jdk7/tl/jdk: 2 new changesets
Changeset: 302877469037 Author:alanb Date: 2011-02-17 20:50 + URL: http://hg.openjdk.java.net/jdk7/tl/jdk/rev/302877469037 6526860: (fc) FileChannel.position returns 0 when FileOutputStream opened in append mode Reviewed-by: forax ! src/share/classes/sun/nio/ch/FileChannelImpl.java ! src/solaris/classes/sun/nio/fs/UnixChannelFactory.java ! test/java/nio/channels/FileChannel/Position.java Changeset: a5861eb81f3c Author:alanb Date: 2011-02-17 20:53 + URL: http://hg.openjdk.java.net/jdk7/tl/jdk/rev/a5861eb81f3c Merge
hg: jdk7/tl/jdk: 7018459: javax.script code comments have issues with HTML4 validation and Accessibility compliance
Changeset: dd143033cef1 Author:sundar Date: 2011-02-18 12:07 +0530 URL: http://hg.openjdk.java.net/jdk7/tl/jdk/rev/dd143033cef1 7018459: javax.script code comments have issues with HTML4 validation and Accessibility compliance Reviewed-by: jjh ! src/share/classes/javax/script/ScriptEngineFactory.java
