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POPurpose of com.ibm.oti.vm.bootstrap.library.path on AIX j9vm JVM
 

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  1. POPurpose of com.ibm.oti.vm.bootstrap.library.path on AIX j9vm JVM
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    <h1>Background</h1> <p>I have a C++ program that loads a JVM internally and then uses JNI to call code in the JVM. This runs on multiple platforms including AIX. However, when starting the JVM on AIX everything is fine until I call some code that needs to access native code supplied as part of the JRE. I then run into this error message:</p> <pre><code>java.lang.UnsatisfiedLinkError: net (Not found in com.ibm.oti.vm.bootstrap.library.path) </code></pre> <p>The problem is that the JVM cannot find the shared library <code>libnet.so</code>. If I dump the value of the <code>com.ibm.oti.vm.bootstrap.library.path</code> system property from Java code running in the JVM I see that by default (i.e. not me setting it) it has the value:</p> <pre><code>&lt;jre-base-dir&gt;/lib/ppc/default:&lt;jre-base-dir&gt;/lib/ppc </code></pre> <p>From the error message I guessed it would be a good idea to change this to include the dir where <code>libnet.so</code> is located. However, this shared library is in <code>&lt;jre-base-dir&gt;/lib/ppc</code> which is already in the path set by <code>com.ibm.oti.vm.bootstrap.library.path</code>, so it seems the error message is incorrect.</p> <p>Experimenting with different values for this system property makes me believe that it is used by the AIX j9vm to load the internal JVM shared libraries only (like <code>libjclse7b_26.so</code>) but not the native code implementations (like <code>libnet.so</code>).</p> <h1>My fix</h1> <p>To fix my problem I had to change the <code>LIBPATH</code> environment variable (which is AIX the equivalent of <code>LD_LIBRARY_PATH</code> in e.g. Linux).</p> <pre><code>$ LIBPATH=&lt;jre-base-dir&gt;/lib/ppc:&lt;jre-base-dir&gt;/lib/ppc/j9vm ./myprogram </code></pre> <h1>Questions</h1> <ol> <li><p>Can anyone shed some light on the real purpose of the system property <code>com.ibm.oti.vm.bootstrap.library.path</code> on AIX when using the j9vm JVM?</p></li> <li><p>Is my fix the correct way to solve the problem or should I use some other system property? (I have tried <code>java.library.path</code> but it does not seem to help.)</p></li> </ol>
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    1. COWhat version of Java do you use? We have following exception "Exception in thread "main" java.lang.UnsatisfiedLinkError: fontmanager (Not found in com.ibm.oti.vm.bootstrap.library.path)". But your fix does not work for us. We use IBM Java 1.6 SR14.
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      1. POPurpose of com.ibm.oti.vm.bootstrap.library.path on AIX j9vm JVM
      1. USVolodymyr Bezuglyy
    2. COHere is the version info: $ ./java -version ↵ java version "1.7.0" ↵ Java(TM) SE Runtime Environment (build pap3270sr5-20130619_01(SR5)) ↵ IBM J9 VM (build 2.6, JRE 1.7.0 AIX ppc-32 20130617_152572 (JIT enabled, AOT enabled) ↵ J9VM - R26_Java726_SR5_20130617_1436_B152572 ↵ JIT - r11.b04_20130528_38954ifx1 ↵ GC - R26_Java726_SR5_20130617_1436_B152572 ↵ J9CL - 20130617_152572) ↵ JCL - 20130616_01 based on Oracle 7u25-b12
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      1. POPurpose of com.ibm.oti.vm.bootstrap.library.path on AIX j9vm JVM
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