Java NIO: What does IOException: Broken pipe mean? -

-

For some of my Java NIO connections, when I have a SocketChannel.write (ByteBuffer) Calls, it throws a IOException : "broke pipe".

What causes "broken pipes", and, more importantly, is it possible to get it from that position? If this can not be fixed, then it seems that it would be a good sign that an irreversible problem has occurred and I should close this socket connection. Is this a reasonable assumption? Is there ever a time when it happens IOException , while the socket connection is still properly connected in the first place (instead of failing at some point in some work)?

On one side note, it's wise to always call SocketChannel.isConnected () a SocketChannel.write () before attempting And if so, then I can also assume that the connection is "broken" and should be closed if both SocketChannel.isConnected () and SocketChannel.isConnectionPending () Both false ?

Thank you!

What causes "broken pipes", and more importantly Is it possible to recover from that state?

This is due to something close to the connection (this is not your application which has closed the connection: resulting in a different exception.)

It is not possible to recover connections. You have to open a new account.

If this can not be fixed, then it seems that it would be a good sign that an irreversible problem has occurred and I should close this socket connection. Is this a reasonable assumption?

Yes Once you receive this exception, the socket will never work again. Closing is the only wise thing to do.

There was ever a time when this IOException occurs while the socket connection is still being properly added in the first place (a functional connection which is some point But fail) instead?

No (or at least not, without destroying the OS'es network stack, JVM and / or the proper behavior of your application.)

It is always wise to call SocketChannel / socketchannel.write () ...

Before

< / P>

before calling RISax () before the call uses the external (external) resource r There is a small chance that the status of the resource between two calls will change.

In this particular case, Calling isconnected () is redundant. This method is defined to go back to true , if socket The last few points were attached . It does not tell you that the connection is still alive. The only way to determine whether the connection is still alive is to try to use it; Like reading or writing.


Comments

Post a Comment

Popular posts from this blog

c# - ListView onScroll event -

-
I am programming a simple C # application, and I need a Scallow event on the list view. So I inherited the original ListView class created in ListviewEx witch. I found out how to locate the scroll message from WinAPI and I modified the WndProc method. Now I have this WndProc: protected override zero WndProc (Ref message message) {base.WndProc (Ref I); If (m.msg == WM_VSCROLL) {onScroll (This, New EventArgs ()); }} But the problem is, I do not know how to know about scrolling information. This data should be in wParam, but there is a LOWORD macro ++ like in C in C # and I switch to find the criteria like SB_ below, SB_ENDSCROLL, SB_PAGEUP etc. there any way Need to change the LOWORD macro from C #? Or any other way to find the necessary parameters about scrolling? You can define the WParam constants as the following: Private const int WM_HSCROLL = 0x114; Private Constant WM_VSCROLL = 0x115; Private contact int SBHOZZ = 0; Private Consultant SB_VERT = 1; Private Con...
Read more

PHP - get image from byte array -

-
I am trying to create a back-end for my mobile application. I am sending the content of an image in the body of the HTTP request (output stream) as a byte array, I want to read this stream of bytes in PHP scripts and take back an image. Can anyone tell me how can I do this? Thank you. You can obtain the request body $ body = Reading from file_get_contents ('php: // input'); What you do with that data Depending on you, you can write the data in a file as you mentioned that this is image data, you can drop the data into the object can do. Another option is to use and load the image.
Read more

Linux Terminal Problem with Non-Canonical Terminal I/O app -

-
I have a small app written in C to run on Linux. Part of the app accepts user-input from keyboard , And it uses non-canonical terminal mode so that it can respond to each keystroke. The section of the code that accepts input is a simple task that is called repeatedly in the loop: char get_input () {char C = 0; Int res = reading (input_tamille, & amp; c, 1); If (RSS == 0) 0 returns; If (res == -1) {/ * snip error handling * /} return c; } It reads a letter from the terminal if there is no input within a given time limit, (c_cc [VTIME] value in the vocabulary structure), read () 0 And get_input () is called again It all works very well, I have recently discovered that if you run this app in a terminal window, and then the app Close the terminal window without ending, the app will not exit Received, but CPU intensive launches into an infinite loop, where the read () returns 0 without waiting continued. So how can I get out of the apple if it runs from the terminal win...
Read more