JDK-7103610 : _NET_WM_PID and WM_CLIENT_MACHINE are not set
  • Type: Bug
  • Component: client-libs
  • Sub-Component: java.awt
  • Affected Version: p1.0,7
  • Priority: P4
  • Status: Resolved
  • Resolution: Fixed
  • OS: linux,linux_ubuntu
  • CPU: x86
  • Submitted: 2011-10-21
  • Updated: 2012-06-07
  • Resolved: 2011-12-14
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Unresolved : Release in which this issue/RFE will be addressed.
Resolved: Release in which this issue/RFE has been resolved.
Fixed : Release in which this issue/RFE has been fixed. The release containing this fix may be available for download as an Early Access Release or a General Availability Release.

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JDK 7 JDK 8
7u4Fixed 8 b17Fixed
Description
FULL PRODUCT VERSION :
java version "1.7.0"
Java(TM) SE Runtime Environment (build 1.7.0-b147)
Java HotSpot(TM) 64-Bit Server VM (build 21.0-b17, mixed mode)


ADDITIONAL OS VERSION INFORMATION :
Ubuntu 11.10
Linux 3.0.0-12-generic #20-Ubuntu SMP Fri Oct 7 14:56:25 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux


EXTRA RELEVANT SYSTEM CONFIGURATION :
gnome3 with gnome-shell as desktop environment

A DESCRIPTION OF THE PROBLEM :
The X-Window properties _NET_WM_PID and WM_CLIENT_MACHINE and WM_CLASS of X11 are not set when opening windows (e.g. JFrame) on jre 1.7.0 or jdk 1.7.0 .

This leads especially to strange behaviour with gnome-shell application switcher, the windows of one java application are not grouped together, and for TrayIcon, which will is not displayed depend on this properties correctly set.


STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Starting java applications with multiple windows in one application (like netbeans) in gnome3/gnome-shell as desktop environment.



EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
The application switcher of gnome-shell (ALT-TAB) shows just one entry for all windows of the same application.

ACTUAL -
The application switcher of gnome-shell (ALT-TAB) shows multiple entries in the gnome application-switcher (ALT-TAB).
A Tray Icon won't show up in the system tray at the bottom.


REPRODUCIBILITY :
This bug can be reproduced always.
Comments
SUGGESTED FIX --- a/make/sun/xawt/mapfile-vers Thu Nov 10 17:37:29 2011 +0400 +++ b/make/sun/xawt/mapfile-vers Fri Nov 11 15:17:51 2011 +0300 @@ -322,6 +322,8 @@ SUNWprivate_1.1 { Java_sun_awt_X11_XlibWrapper_XSynchronize; Java_java_awt_FileDialog_initIDs; Java_sun_awt_X11_XWindow_initIDs; + Java_sun_awt_X11_XWindowPeer_getLocalHostname; + Java_sun_awt_X11_XWindowPeer_getJvmPID; Java_sun_java2d_opengl_OGLContext_getOGLIdString; Java_sun_java2d_opengl_OGLMaskFill_maskFill; --- a/src/solaris/classes/sun/awt/X11/XWindowPeer.java Thu Nov 10 17:37:29 2011 +0400 +++ b/src/solaris/classes/sun/awt/X11/XWindowPeer.java Fri Nov 11 15:17:51 2011 +0300 @@ -208,11 +208,18 @@ class XWindowPeer extends XPanelPeer imp return name; } + private static native String getLocalHostname(); + private static native int getJvmPID(); + void postInit(XCreateWindowParams params) { super.postInit(params); // Init WM_PROTOCOLS atom initWMProtocols(); + + // Set _NET_WM_PID and WM_CLIENT_MACHINE using this JVM + XAtom.get("WM_CLIENT_MACHINE").setProperty(getWindow(), getLocalHostname()); + XAtom.get("_NET_WM_PID").setCard32Property(getWindow(), getJvmPID()); // Set WM_TRANSIENT_FOR and group_leader Window t_window = (Window)target; --- a/src/solaris/native/sun/xawt/XToolkit.c Thu Nov 10 17:37:29 2011 +0400 +++ b/src/solaris/native/sun/xawt/XToolkit.c Fri Nov 11 15:17:51 2011 +0300 @@ -46,6 +46,8 @@ #include "java_awt_SystemColor.h" #include "java_awt_TrayIcon.h" #include <X11/extensions/XTest.h> + +#include <unistd.h> uint32_t awt_NumLockMask = 0; Boolean awt_ModLockIsShiftLock = False; @@ -1087,3 +1089,38 @@ int32_t getNumButtons() { return local_num_buttons; } + +/* + * Class: sun_awt_X11_XWindowPeer + * Method: getJvmPID + * Signature: ()I + */ +JNIEXPORT jint JNICALL Java_sun_awt_X11_XWindowPeer_getJvmPID +(JNIEnv *env, jclass cls) +{ + /* Return the JVM's PID. */ + return getpid(); +} + +#ifndef HOST_NAME_MAX +#define HOST_NAME_MAX 1024 /* Overestimated */ +#endif + +/* + * Class: sun_awt_X11_XWindowPeer + * Method: getLocalHostname + * Signature: ()Ljava/lang/String; + */ +JNIEXPORT jstring JNICALL Java_sun_awt_X11_XWindowPeer_getLocalHostname +(JNIEnv *env, jclass cls) +{ + /* Return the machine's FQDN. */ + char hostname[HOST_NAME_MAX + 1]; + if (gethostname(hostname, HOST_NAME_MAX + 1) == 0) { + hostname[HOST_NAME_MAX] = '\0'; + jstring res = (*env)->NewStringUTF(env, hostname); + return res; + } + + return (jstring)NULL; +}
16-11-2011
EVALUATION http://hg.openjdk.java.net/jdk8/awt/jdk/rev/f614bcada2a9
11-11-2011
EVALUATION Contributed fix: http://mail.openjdk.java.net/pipermail/awt-dev/2011-October/001951.html It has some issues with retrieving the PID and FQDN, this is currently being discussed on the mailing list.
24-10-2011