private void printQueueFull() {
        if (AgentUtils.getCurrentTime() - lastPrintTime > TimeUnit.SECONDS.toMillis(1)) {
            lastPrintTime = AgentUtils.getCurrentTime();
            LOGGER.warn("message queue is greater than {}, stop adding message, "
                    + "maybe proxy get stuck", maxQueueNumber);
        }
    }
Add proxy message to cache, proxy message should belong to the same stream id.
inlong-agent/agent-common/src/main/java/org/apache/inlong/agent/message/file/ProxyMessageCache.java