使用Jedis在高并发报错 (java.net.SocketException: Connection reset by peer: socket write error)
1.报错信息
java.lang.reflect.InvocationTargetException: null
at sun.reflect.GeneratedMethodAccessor15.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
....
at java.lang.Thread.run(Unknown Source)
Caused by: redis.clients.jedis.exceptions.JedisConnectionException: java.net.SocketException: Connection reset by peer: socket write error
at redis.clients.jedis.Connection.flush(Connection.java:334)
at redis.clients.jedis.Connection.getBinaryBulkReply(Connection.java:257)
at redis.clients.jedis.BinaryJedis.get(BinaryJedis.java:244)
......
... 15 common frames omitted
Caused by: java.net.SocketException: Connection reset by peer: socket write error
at java.net.SocketOutputStream.socketWrite0(Native Method)
at java.net.SocketOutputStream.socketWrite(Unknown Source)
at java.net.SocketOutputStream.write(Unknown Source)
at redis.clients.util.RedisOutputStream.flushBuffer(RedisOutputStream.java:52)
at redis.clients.util.RedisOutputStream.flush(RedisOutputStream.java:216)
at redis.clients.jedis.Connection.flush(Connection.java:331)
... 22 common frames omitted
Connection reset by peer: socket write error错误分析:
常出现的Connection reset by peer: 原因可能是多方面的,不过更常见的原因是:
①:服务器的并发连接数超过了其承载量,服务器会将其中一些连接Down掉;
②:客户关掉了浏览器,而服务器还在给客户端发送数据;
③:浏览器端按了Stop
所以本问题是由 ①造成的
修改之前的代码
初始化jedis的代码
/**
* 在多线程环境同步初始化
*/
private static synchronized void poolInit() {
if (pool == null) {
createJedisPool();
}
}
* 获取一个jedis 对象
*
* @return
*/
public static Jedis getJedis() {
if (pool == null) {
poolInit();
}
return pool.getResource();
}
使用jedis的代码
private static Jedis jedis = JedisPoolUtil.getJedis();
public static Object getObject(String key) {
if(exists(key)){
return deserialize(jedis.get(key.getBytes()));
}
return null;
}
修改之后的代码
初始化jedis的代码
/**
* 获取一个jedis 对象
*
* @return
*/
public static Jedis getJedis() {
if (pool == null) {
poolInit();
}
//如果没有以下代码会造成初始化的jedis拿不到 jedis对象
Jedis jedis = null;
try {
if (pool != null) {
jedis = pool.getResource();
}
}
catch (Exception e) {
logger.error("获取redis失败 : {}" + ExceptionUtils.getStackTrace(e));
}
return jedis;
}
使用jedis的代码
/**
* 读取对象
*
* @param key
* @return
*/
public static Object getObject(String key) {
if (exists(key)) {
//初始化jedis用完之后关闭连接
Jedis jedis = JedisPoolUtil.getJedis();
Object object = deserialize(jedis.get(key.getBytes()));
jedis.close();
return object;
}
return null;
}