为什么spring-boot和postgres连接在一定时间后会中断？

Question

null

我的数据库服务器在x86_64-unknown-linux-gnu上运行PostgreSQL 9.4.1，数据库和应用服务器之间没有防火墙。

我需要tcp_keep活的吗？

为什么我的连接会在一定时间后中断，并且不再可以恢复？

#
# [ Database Configuration Section ]
#
spring.jpa.database=POSTGRESQL
spring.jpa.show-sql=false
hibernate.format_sql=true
hibernate.hbm2ddl.auto=validate
spring.jpa.hibernate.naming-strategy=org.hibernate.cfg.DefaultNamingStrategy

spring.datasource.platform=postgres
spring.database.driverClassName=org.postgresql.Driver
spring.datasource.url=jdbc:postgresql://*****:5434/******
spring.datasource.username=*****
spring.datasource.password=*****

logging.file=*******.log
logging.level.=WARNING

2015-09-29 11:58:50.598  INFO 10498 --- [nio-9092-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring FrameworkServlet 'dispatcherServlet'
2015-09-29 11:58:50.598  INFO 10498 --- [nio-9092-exec-1] o.s.web.servlet.DispatcherServlet        : FrameworkServlet 'dispatcherServlet': initialization started
2015-09-29 11:58:50.674  INFO 10498 --- [nio-9092-exec-1] o.s.web.servlet.DispatcherServlet        : FrameworkServlet 'dispatcherServlet': initialization completed in 76 ms

2015-09-29 19:23:03.777  WARN 10498 --- [ool-3-thread-16] o.h.engine.jdbc.spi.SqlExceptionHelper   : SQL Error: 0, SQLState: 08006
2015-09-29 19:23:03.779 ERROR 10498 --- [ool-3-thread-16] o.h.engine.jdbc.spi.SqlExceptionHelper   : An I/O error occurred while sending to the backend.
2015-09-29 19:23:03.785  INFO 10498 --- [ool-3-thread-16] o.h.e.j.b.internal.AbstractBatchImpl     : HHH000010: On release of batch it still contained JDBC statements
2015-09-29 19:23:03.836 ERROR 10498 --- [ool-3-thread-16] o.s.orm.jpa.JpaTransactionManager        : Commit exception overridden by rollback exception
java.net.SocketException: Connection timed out
    at java.net.SocketInputStream.socketRead0(Native Method) ~[na:1.8.0_25]
    at java.net.SocketInputStream.read(SocketInputStream.java:150) ~[na:1.8.0_25]
    at java.net.SocketInputStream.read(SocketInputStream.java:121) ~[na:1.8.0_25]
    at org.postgresql.core.VisibleBufferedInputStream.readMore(VisibleBufferedInputStream.java:143) ~[postgresql-9.4-1202-jdbc41.jar!/:9.4]
    at org.postgresql.core.VisibleBufferedInputStream.ensureBytes(VisibleBufferedInputStream.java:112) ~[postgresql-9.4-1202-jdbc41.jar!/:9.4]
    at org.postgresql.core.VisibleBufferedInputStream.read(VisibleBufferedInputStream.java:71) ~[postgresql-9.4-1202-jdbc41.jar!/:9.4]
    at org.postgresql.core.PGStream.ReceiveChar(PGStream.java:282) ~[postgresql-9.4-1202-jdbc41.jar!/:9.4]
    at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:1718) ~[postgresql-9.4-1202-jdbc41.jar!/:9.4]
    at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:173) ~[postgresql-9.4-1202-jdbc41.jar!/:9.4]
    ... 61 common frames omitted
Wrapped by: org.postgresql.util.PSQLException: An I/O error occurred while sending to the backend.
    at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:201) ~[postgresql-9.4-1202-jdbc41.jar!/:9.4]
    at org.postgresql.jdbc2.AbstractJdbc2Statement.execute(AbstractJdbc2Statement.java:615) ~[postgresql-9.4-1202-jdbc41.jar!/:9.4]
    at org.postgresql.jdbc2.AbstractJdbc2Statement.executeWithFlags(AbstractJdbc2Statement.java:465) ~[postgresql-9.4-1202-jdbc41.jar!/:9.4]
    at org.postgresql.jdbc2.AbstractJdbc2Statement.executeUpdate(AbstractJdbc2Statement.java:411) ~[postgresql-9.4-1202-jdbc41.jar!/:9.4]
    at org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.executeUpdate(ResultSetReturnImpl.java:208) ~[hibernate-core-4.3.11.Final.jar!/:4.3.11.Final]
    ... 57 common frames omitted
Wrapped by: org.hibernate.exception.JDBCConnectionException: could not execute statement

  spring.datasource.testOnBorrow=true
  spring.datasource.validationQuery=SELECT 1




Answer 1

正如@Yuki Yoshida所说，答案就是这么简单。

我将spring.datasource.validation-query=select 1spring.datasource.test-on-borrow=true添加到我的配置中，它工作了。

借道测试：

TestonBorrow：默认值：true

在从池中借用对象之前是否验证对象的指示。如果对象验证失败，它将从池中删除，我们将尝试借用另一个对象。

和validationquery：default：对于大多数db语言选择1其他请参阅此处