Use custom classloader that reads classpath entries from the file to avoid failure creating junit process.

java/java-runtime/src/com/intellij/rt/execution/ExternalClasspathClassLoader.java

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+/*
+ * Copyright 2000-2010 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/*
+ * @author max
+ */
+package com.intellij.rt.execution;
+
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.FileReader;
+import java.io.IOException;
+import java.net.URL;
+import java.net.URLClassLoader;
+import java.util.ArrayList;
+import java.util.List;
+
+public class ExternalClasspathClassLoader extends URLClassLoader {
+  public ExternalClasspathClassLoader() {
+    super(parseUrls());
+  }
+
+  private static URL[] parseUrls() {
+    final List urls = new ArrayList();
+    final File file = new File(System.getProperty("classpath.file"));
+    try {
+      final BufferedReader reader = new BufferedReader(new FileReader(file));
+      try {
+        while(reader.ready()) {
+          final String fileName = reader.readLine();
+          try {
+            urls.add(new File(fileName).toURI().toURL());
+          }
+          catch (NoSuchMethodError e) {
+            urls.add(new File(fileName).toURL());
+          }
+        }
+      }
+      finally {
+        reader.close();
+      }
+
+      return (URL[])urls.toArray(new URL[urls.size()]);
+    }
+    catch (IOException e) {
+      throw new RuntimeException("Cannot read classpath entries from file: " + e);
+    }
+    finally {
+      file.delete();
+    }
+  }
+}