[GitHub] [nifi] turcsanyip commented on a change in pull request #4540: NIFI-7825: Support native library loading via absolute path

[GitBox <gi...@apache.org>]

turcsanyip commented on a change in pull request #4540:
URL: https://github.com/apache/nifi/pull/4540#discussion_r496792424



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File path: nifi-nar-bundles/nifi-framework-bundle/nifi-framework/nifi-resources/src/main/resources/conf/bootstrap.conf
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@@ -66,6 +66,15 @@ java.arg.16=-Djavax.security.auth.useSubjectCredsOnly=true
 # Please see https://zookeeper.apache.org/doc/current/zookeeperAdmin.html#sc_adminserver_config for configuration options.
 java.arg.17=-Dzookeeper.admin.enableServer=false
 
+# The following options configure a Java Agent to handle native library loading.
+# It is needed when a custom jar (eg. JDBC driver) has been configured on a component in the flow and this custom jar depends on a native library
+# and tries to load it by its absolute path (java.lang.System.load(String filename) method call).
+# Use this Java Agent only if you get "Native Library ... already loaded in another classloader" errors otherwise!
+#java.arg.18=-javaagent:./lib/aspectjweaver-${aspectj.version}.jar

Review comment:
       The agent does not require `aspectjweaver.jar` on the classpath so `lib/aspectj` directory could work.
   If there are concerns about having this jar on the system classpath, I can try out that solution too.




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