okhttp经常出现SocketTimeoutException

一开始，我创建的okhttpclient的方式：

val clientBuilder = new OkHttpClient.Builder()
			.readTimeout(readTimeoutMillis, TimeUnit.MILLISECONDS)
			.writeTimeout(writeTimeoutMillis, TimeUnit.MILLISECONDS)
            .connectTimeout(connectTimeoutMillis, TimeUnit.MILLISECONDS)
            .retryOnConnectionFailure(true)

改善的方法就是加多下面两行：

.connectionPool(ConnectionPool(0, 1, TimeUnit.NANOSECONDS));
.protocols(listOf(Protocol.HTTP_1_1))

最后的代码如下

val clientBuilder = new OkHttpClient.Builder()
			.readTimeout(readTimeoutMillis, TimeUnit.MILLISECONDS)
			.writeTimeout(writeTimeoutMillis, TimeUnit.MILLISECONDS)
            .connectTimeout(connectTimeoutMillis, TimeUnit.MILLISECONDS)
            .retryOnConnectionFailure(true)
            .connectionPool(ConnectionPool(0, 1, TimeUnit.NANOSECONDS));
            .protocols(listOf(Protocol.HTTP_1_1))

这样的代码运行起来就没有经常出现这个异常了。