final StringBuilder buf = createStringBuffer(keyObj, getCurrentTimeMillis());
                buf.append('\t').append("action:begin");
                buf.append('\t').append("error:").append(escapeValue(e.getLocalizedMessage()).replaceAll("\\s", " "));
                log(buf);
            }
        });
    }

    /**
     * Records a statistics action for the specified crawler object.
     *

    protected String buildThrowableMessage(final Throwable t) {
        final StringBuilder buf = new StringBuilder(100);
        Throwable current = t;
        while (current != null) {
            buf.append(current.getLocalizedMessage()).append(' ');
            current = current.getCause();
        }
        return buf.toString();
    }

    /**
     * Checks if a checkbox value represents an enabled state.