我正在使用 play 框架(版本 2.8.0)、java(版本 1.8)和 Oracle 数据库(版本 12C)开发一个应用程序。
一天内只有零次或一次对数据库的点击，我收到以下错误。
java.sql.SQLRecoverableException: IO Error: Socket read timed out
at oracle.jdbc.driver.T4CConnection.logoff(T4CConnection.java:919)
at oracle.jdbc.driver.PhysicalConnection.close(PhysicalConnection.java:2005)
at com.zaxxer.hikari.pool.PoolBase.quietlyCloseConnection(PoolBase.java:138)
at com.zaxxer.hikari.pool.HikariPool.lambda$closeConnection$1(HikariPool.java:447)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.net.SocketTimeoutException: Socket read timed out
at oracle.net.nt.TimeoutSocketChannel.read(TimeoutSocketChannel.java:174)
at oracle.net.ns.NIOHeader.readHeaderBuffer(NIOHeader.java:82)
at oracle.net.ns.NIOPacket.readFromSocketChannel(NIOPacket.java:139)
at oracle.net.ns.NIOPacket.readFromSocketChannel(NIOPacket.java:101)
at oracle.net.ns.NIONSDataChannel.readDataFromSocketChannel(NIONSDataChannel.java:80)
at oracle.jdbc.driver.T4CMAREngineNIO.prepareForReading(T4CMAREngineNIO.java:98)
at oracle.jdbc.driver.T4CMAREngineNIO.unmarshalUB1(T4CMAREngineNIO.java:534)
at oracle.jdbc.driver.T4CTTIfun.receive(T4CTTIfun.java:485)
at oracle.jdbc.driver.T4CTTIfun.doRPC(T4CTTIfun.java:252)
at oracle.jdbc.driver.T4C7Ocommoncall.doOLOGOFF(T4C7Ocommoncall.java:62)
at oracle.jdbc.driver.T4CConnection.logoff(T4CConnection.java:908)
... 6 common frames omitted
db {
default {
driver=oracle.jdbc.OracleDriver
url="jdbc:oracle:thin:@XXX.XXX.XXX.XX:XXXX/XXXXXXX"
username="XXXXXXXXX"
password="XXXXXXXXX"
hikaricp {
dataSource {
cachePrepStmts = true
prepStmtCacheSize = 250
prepStmtCacheSqlLimit = 2048
}
}
}
}
这似乎是由于数据库连接不活动造成的，我该如何解决这个问题？ 如果需要任何其他信息，请告诉我？
最佳答案
您可以为 JDBC 启用 TCP keepalive - 通过设置 JVM 指令或通过在连接字符串中添加“ENABLE=BROKEN”来启用。
但是:
- 通常，当 TCP 连接处于非 Activity 状态超过一小时时，Cisco/Juniper 就会切断 TCP 连接。
- Linux 内核在两小时后(tcp_keepalive_time)开始发送 keepalive 探测。因此，如果您决定打开 tcp keepalive，您还需要 root 来将此内核可调值更改为较低值(10-15 分钟)
- 此外，默认情况下，HikariCP 不应使任何连接保持打开状态超过 30 分钟。
因此，如果您的固件、Linux 内核和 HikariCP 都使用默认设置，那么您的系统中不应出现此错误。
参见 HikariCP official documentation
maxLifetime: This property controls the maximum lifetime of a connection in the pool. An in-use connection will never be retired, only when it is closed will it then be removed. On a connection-by-connection basis, minor negative attenuation is applied to avoid mass-extinction in the pool. We strongly recommend setting this value, and it should be several seconds shorter than any database or infrastructure imposed connection time limit. A value of 0 indicates no maximum lifetime (infinite lifetime), subject of course to the idleTimeout setting. The minimum allowed value is 30000ms (30 seconds). Default: 1800000 (30 minutes)
关于java - 使用hikari连接池时如何解决 "Socket read timed out"，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/62632709/