Don't fail on killing, only log the error.

platform/platform-impl/src/com/intellij/execution/process/KillableColoredProcessHandler.java

@@ -40,6 +40,7 @@ public class KillableColoredProcessHandler extends ColoredProcessHandler impleme
 
   /**
    * This method shouldn't be overriden, see shouldKillProcessSoftly
+   *
    * @return
    */
   private boolean canKillProcessSoftly() {
@@ -52,17 +53,20 @@ public class KillableColoredProcessHandler extends ColoredProcessHandler impleme
     if (canKillProcessSoftly() && shouldKillProcessSoftly()) {
       // Unix: [soft-kill] at first send INT signal:
       final Process process = getProcess();
-      UnixProcessManager.sendSigIntToProcessTree(process);
-    }
-    else {
-      // if soft kill isn't supported - use default implementation
-      super.doDestroyProcess();
-      // else IDE will suggest 'terminate dialog'
+      if (UnixProcessManager.sendSigIntToProcessTree(process)) {
+        return;
+      }
     }
+
+    // if soft kill isn't supported - use default implementation
+    super.doDestroyProcess();
+    // else IDE will suggest 'terminate dialog'
+
   }
 
   /**
    * This method should be overriden by children if the process shouldn't be killed softly (e.g. by kill -2)
+   *
    * @return
    */
   protected boolean shouldKillProcessSoftly() {

platform/util/src/com/intellij/execution/process/UnixProcessManager.java

@@ -32,6 +32,8 @@ import java.util.*;
  * @author traff
  */
 public class UnixProcessManager {
+  private static final Logger LOG = Logger.getInstance(UnixProcessManager.class);
+
   public static final int SIGINT = 2;
   public static final int SIGKILL = 9;
   public static final int SIGTERM = 15;
@@ -104,6 +106,7 @@ public class UnixProcessManager {
    * @param process tree root process
    */
   public static boolean sendSignalToProcessTree(Process process, int signal) {
+    try {
     checkCLib();
 
     final int our_pid = C_LIB.getpid();
@@ -138,6 +141,11 @@ public class UnixProcessManager {
     else {
       return true; //the parent process was already killed
     }
+    } catch (Exception e) {
+      //If we fail somehow just return false
+      LOG.warn("Error killing the process", e);
+      return false;
+    }
   }
 
   private static void findChildProcesses(final int our_pid,
@@ -208,7 +216,7 @@ public class UnixProcessManager {
         errorStr.append(s).append("\n");
       }
       if (errorStr.length() > 0) {
-        throw new IllegalStateException("error:" + errorStr.toString());
+        throw new IOException("Error reading ps output:" + errorStr.toString());
       }
     }
     finally {