log thread stack and exception upon oome

src/main/java/org/cobbzilla/util/system/OutOfMemoryErrorUncaughtExceptionHandler.java

@@ -4,6 +4,7 @@ import lombok.AllArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 
 import static org.cobbzilla.util.daemon.ZillaRuntime.shortError;
+import static org.cobbzilla.util.daemon.ZillaRuntime.stacktrace;
 
 @AllArgsConstructor @Slf4j
 public class OutOfMemoryErrorUncaughtExceptionHandler implements Thread.UncaughtExceptionHandler {
@@ -17,7 +18,7 @@ public class OutOfMemoryErrorUncaughtExceptionHandler implements Thread.Uncaught
     @Override public void uncaughtException(Thread t, Throwable e) {
         if (e instanceof OutOfMemoryError) {
             try {
-                log.error("!!!!! OutOfMemoryError: calling System.exit("+status+")", e);
+                log.error("!!!!! OutOfMemoryError: calling System.exit("+status+") from "+stacktrace(t), e);
             } catch (Throwable ignored) {}
             System.exit(status);
         } else {