Http超時時間之SocketTimeout

/**
     * Sets the read timeout to a specified timeout, in
     * milliseconds. A non-zero value specifies the timeout when
     * reading from Input stream when a connection is established to a
     * resource. If the timeout expires before there is data available
     * for read, a java.net.SocketTimeoutException is raised. A
     * timeout of zero is interpreted as an infinite timeout.
     *
     *<p> Some non-standard implementation of this method ignores the
     * specified timeout. To see the read timeout set, please call
     * getReadTimeout().
     *
     * @param timeout an {@code int} that specifies the timeout
     * value to be used in milliseconds
     * @throws IllegalArgumentException if the timeout parameter is negative
     *
     * @see #getReadTimeout()
     * @see InputStream#read()
     * @since 1.5
     */
    public void setReadTimeout(int timeout) {
        if (timeout < 0) {
            throw new IllegalArgumentException("timeout can not be negative");
        }
        readTimeout = timeout;
    }

 

 
    /**
     * Defines the socket timeout ({@code SO_TIMEOUT}) in milliseconds,
     * which is the timeout for waiting for data  or, put differently,
     * a maximum period inactivity between two consecutive data packets).
     * <p>
     * A timeout value of zero is interpreted as an infinite timeout.
     * A negative value is interpreted as undefined (system default).
     * </p>
     * <p>
     * Default: {@code -1}
     * </p>
     */
    public int getSocketTimeout() {
        return socketTimeout;
    }

1. connectTimeOut：指建立連接的超時時間，比較容易理解

2. connectionRequestTimeOut：指從連接池獲取到連接的超時時間，如果是非連接池的話，該參數暫時沒有發現有什么用處

3. socketTimeOut：指客戶端和服務進行數據交互的時間，是指兩者之間如果兩個數據包之間的時間大於該時間則認為超時，而不是整個交互的整體時間，比如如果設置1秒超時，如果每隔0.8秒傳輸一次數據，傳輸10次，總共8秒，這樣是不超時的。而如果任意兩個數據包之間的時間超過了1秒，則超時。

 

線上問題：設置sockettimeout 15秒，但是實際到達156秒，線程數陡增，導致機器崩潰，具體原因有待抓包分析

1.RequestConfig 的配置

2.sockettimeout