IV25456: JNI APPLICATION FAILS WITH JAVA.LANG.UNSATISFIEDLINKERROR WHILE LOADING LIBAWT.SO

APAR status

• Closed as fixed if next.

Error description

• Error Message: N/A
  .
  Stack Trace: java.lang.UnsatisfiedLinkError: awt (An exception
  was pending after running JNI_OnLoad)
  at
  java.lang.ClassLoader.loadLibraryWithPath(ClassLoader.java:1011)
  at
  java.lang.ClassLoader.loadLibraryWithClassLoader(ClassLoader.jav
  a:975)
  at java.lang.System.loadLibrary(System.java:469)
  at
  sun.security.action.LoadLibraryAction.run(LoadLibraryAction.java
  :69)
  at
  java.security.AccessController.doPrivileged(AccessController.jav
  a:202)
  at java.awt.image.ColorModel.loadLibraries(ColorModel.java:199)
  at java.awt.image.ColorModel.<clinit>(ColorModel.java:207)
  at java.lang.J9VMInternals.initializeImpl(Native Method)
  at java.lang.J9VMInternals.initialize(J9VMInternals.java:200)
  at java.awt.image.BufferedImage.<clinit>(BufferedImage.java:285)
  at java.lang.J9VMInternals.initializeImpl(Native Method)
  at java.lang.J9VMInternals.initialize(J9VMInternals.java:200)
  at
  AWTTestFlow_JavaCompute.evaluate(AWTTestFlow_JavaCompute.java:28
  )
  at
  com.ibm.broker.javacompute.MbRuntimeJavaComputeNode.evaluate(MbR
  untimeJavaComputeNode.java:232)
  at com.ibm.broker.plugin.MbNode.evaluate(MbNode.java:1469)
  .
  Any JNI application loaded before loading libawt.so  with
  RTLD_GLOBAL flag fail to load libawt.so .
  

Local fix

• 1) Avoid using RTLD_GLOBAL flag while loading JNI libraries.
   2) Load libawt.so in advance before loading the application JNI
  library which uses RTLD_GLOBAL flag.
  

Problem summary

• The problem occured as JNI application used RTLD_GLOBAL flag
  
  while loading the native libraries.
  
  Using RTLD_GLOBAL is not advisable in JNI application as it can
  cause security  exposure in JVM and it should be avoided with
  JNI application.
  
  We will consider a fall back mechanism to identify the libawt.so
  path correctly in such failure scenario in a future Java
  release.
  

Problem conclusion

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

  IV53898

Fix information

Applicable component levels

• R600 PSY

     UP

• R700 PSY

     UP