find and use matching jdk if remote jre version do not match project sdk

java/debugger/impl/src/com/intellij/debugger/engine/DebugProcessImpl.java

@@ -53,6 +53,10 @@ import com.intellij.openapi.application.ApplicationNamesInfo;
 import com.intellij.openapi.diagnostic.Logger;
 import com.intellij.openapi.extensions.Extensions;
 import com.intellij.openapi.project.Project;
+import com.intellij.openapi.projectRoots.ProjectJdkTable;
+import com.intellij.openapi.projectRoots.Sdk;
+import com.intellij.openapi.roots.ProjectRootManager;
+import com.intellij.openapi.ui.MessageType;
 import com.intellij.openapi.ui.Messages;
 import com.intellij.openapi.util.Disposer;
 import com.intellij.openapi.util.Pair;
@@ -86,7 +90,6 @@ import org.jetbrains.annotations.NonNls;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
-import javax.swing.*;
 import java.io.IOException;
 import java.net.UnknownHostException;
 import java.util.*;
@@ -605,11 +608,34 @@ public abstract class DebugProcessImpl extends UserDataHolderBase implements Deb
   private void checkVirtualMachineVersion(VirtualMachine vm) {
     final String version = vm.version();
     if ("1.4.0".equals(version)) {
-      SwingUtilities.invokeLater(() -> Messages.showMessageDialog(
-        getProject(),
+      DebuggerInvocationUtil.swingInvokeLater(myProject, () -> Messages.showMessageDialog(
+        myProject,
         DebuggerBundle.message("warning.jdk140.unstable"), DebuggerBundle.message("title.jdk140.unstable"), Messages.getWarningIcon()
       ));
     }
+    Sdk projectSdk = ProjectRootManager.getInstance(myProject).getProjectSdk();
+    if (getSession().getAlternativeJre() == null && !versionMatch(projectSdk, version)) {
+      for (Sdk sdk : ProjectJdkTable.getInstance().getAllJdks()) {
+        if (versionMatch(sdk, version)) {
+          XDebugSessionImpl.NOTIFICATION_GROUP.createNotification(
+            DebuggerBundle.message("message.remote.jre.version.mismatch",
+                                   version,
+                                   projectSdk != null ? projectSdk.getVersionString() : "unknown",
+                                   sdk.getName())
+            , MessageType.INFO).notify(myProject);
+          getSession().setAlternativeJre(sdk);
+          break;
+        }
+      }
+    }
+  }
+
+  private static boolean versionMatch(@Nullable Sdk sdk, String version) {
+    if (sdk != null) {
+      String versionString = sdk.getVersionString();
+      return versionString != null && versionString.contains(version);
+    }
+    return false;
   }
 
   /*Event dispatching*/

java/debugger/impl/src/com/intellij/debugger/impl/DebuggerSession.java

@@ -41,6 +41,7 @@ import com.intellij.notification.NotificationType;
 import com.intellij.openapi.application.ApplicationManager;
 import com.intellij.openapi.application.ModalityState;
 import com.intellij.openapi.diagnostic.Logger;
+import com.intellij.openapi.extensions.Extensions;
 import com.intellij.openapi.project.Project;
 import com.intellij.openapi.projectRoots.Sdk;
 import com.intellij.openapi.ui.Messages;
@@ -50,6 +51,7 @@ import com.intellij.openapi.util.Pair;
 import com.intellij.openapi.util.registry.Registry;
 import com.intellij.psi.PsiCompiledElement;
 import com.intellij.psi.PsiDocumentManager;
+import com.intellij.psi.PsiElementFinder;
 import com.intellij.psi.PsiFile;
 import com.intellij.psi.search.GlobalSearchScope;
 import com.intellij.unscramble.ThreadState;
@@ -92,7 +94,7 @@ public class DebuggerSession implements AbstractDebuggerSession {
   private final String mySessionName;
   private final DebugProcessImpl myDebugProcess;
   private final GlobalSearchScope mySearchScope;
-  private final Sdk myAlternativeJre;
+  private Sdk myAlternativeJre;
 
   private final DebuggerContextImpl SESSION_EMPTY_CONTEXT;
   //Thread, user is currently stepping through
@@ -123,6 +125,11 @@ public class DebuggerSession implements AbstractDebuggerSession {
     return myAlternativeJre;
   }
 
+  public void setAlternativeJre(Sdk sdk) {
+    myAlternativeJre = sdk;
+    Extensions.findExtension(PsiElementFinder.EP_NAME, getProject(), AlternativeJreClassFinder.class).clearCache();
+  }
+
   public boolean isModifiedClassesScanRequired() {
     return myModifiedClassesScanRequired;
   }

resources-en/src/messages/DebuggerBundle.properties

@@ -76,6 +76,7 @@ error.no.shmem.address=Shared memory address unspecified
 debugger.jdi.bootstrap.error={0}. Check your JDK installation.
 warning.jdk140.unstable=The debuggee VM version is "1.4.0".\nJ2SDK 1.4.0 documented bugs may cause unstable debugger behavior.\nWe recommend using J2SDK 1.4.0_01 or higher.
 title.jdk140.unstable=VM Version Warning
+message.remote.jre.version.mismatch=Remote jre version ({0})\ndo not match project jdk version ({1}), \nwill use sources from sdk: {2}
 error.invalid.argument={0,choice, 1#Invalid argument|2#Invalid arguments} 
 error.vm.disconnected=VM disconnected. Target virtual machine closed connection
 error.unknown.host=Cannot connect to remote process, host is unknown