when launching build process or javac server suppress libraries from 'ext' directories to ensure compiler is loaded from correct location

java/compiler/impl/src/com/intellij/compiler/server/BuildManager.java

@@ -100,8 +100,7 @@ import org.jetbrains.jps.cmdline.ClasspathBootstrap;
 import org.jetbrains.jps.incremental.Utils;
 import org.jetbrains.jps.model.serialization.JpsGlobalLoader;
 
-import javax.tools.JavaCompiler;
-import javax.tools.ToolProvider;
+import javax.tools.*;
 import java.io.File;
 import java.io.IOException;
 import java.net.InetSocketAddress;
@@ -890,7 +889,8 @@ public class
     launcherCp.add(ClasspathBootstrap.getResourcePath(launcherClass));
     launcherCp.add(compilerPath);
     ClasspathBootstrap.appendJavaCompilerClasspath(launcherCp);
-
+    // this will disable standard extensions to ensure javac is loaded from the right tools.jar
+    cmdLine.addParameter("-Djava.ext.dirs=");
     cmdLine.addParameter("-classpath");
     cmdLine.addParameter(classpathToString(launcherCp));
     

jps/jps-builders/src/org/jetbrains/jps/javac/JavacServerBootstrap.java

@@ -86,6 +86,9 @@ public class JavacServerBootstrap {
       appendParam(cmdLine, "-D" + JavacServer.USE_ECLIPSE_COMPILER_PROPERTY);
     }
 
+    // this will disable standard extensions to ensure javac is loaded from the right tools.jar
+    appendParam(cmdLine, "-Djava.ext.dirs=");
+
     for (String option : vmOptions) {
       appendParam(cmdLine, option);
     }