src/os/linux/vm/attachListener_linux.cpp

*** 451,461 ****
  
    RESTARTABLE(::stat64(fn, &st), ret);
    if (ret == 0) {
      ret = ::unlink(fn);
      if (ret == -1) {
!       debug_only(warning("failed to remove stale attach pid file at %s", fn));
      }
    }
  }
  
  int AttachListener::pd_init() {
--- 451,461 ----
  
    RESTARTABLE(::stat64(fn, &st), ret);
    if (ret == 0) {
      ret = ::unlink(fn);
      if (ret == -1) {
!       log_debug(attach)("Failed to remove stale attach pid file at %s", fn);
      }
    }
  }
  
  int AttachListener::pd_init() {
*** 494,513 ****
--- 494,520 ----
    sprintf(fn, ".attach_pid%d", os::current_process_id());
    int ret;
    struct stat64 st;
    RESTARTABLE(::stat64(fn, &st), ret);
    if (ret == -1) {
+     log_trace(attach)("Failed to find attach file: %s, trying alternate", fn);
      snprintf(fn, sizeof(fn), "%s/.attach_pid%d",
               os::get_temp_directory(), os::current_process_id());
      RESTARTABLE(::stat64(fn, &st), ret);
+     if (ret == -1) {
+       log_debug(attach)("Failed to find attach file: %s", fn);
+     }
    }
    if (ret == 0) {
      // simple check to avoid starting the attach mechanism when
      // a bogus user creates the file
      if (st.st_uid == geteuid()) {
        init();
+       log_trace(attach)("Attach trigerred by %s", fn);
        return true;
+     } else {
+       log_debug(attach)("File %s has wrong user id %d (vs %d). Attach is not trigerred", fn, st.st_uid, geteuid());
      }
    }
    return false;
  }