SQL 错误： 0，SQLState： 08006

postgresql java hibernate

2022-09-03 07:06:48

我有一个具有休眠连接的Web应用程序。应用程序正在连接到 PostgreSQL db。有时，我在日志中会遇到以下异常。

Caused by: **org.postgresql.util.PSQLException: An I/O error occured while sending to the backend.**
at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:283)
at org.postgresql.jdbc2.AbstractJdbc2Statement.execute(AbstractJdbc2Statement.java:479)
at org.postgresql.jdbc2.AbstractJdbc2Statement.executeWithFlags(AbstractJdbc2Statement.java:353)
at org.postgresql.jdbc2.AbstractJdbc2Statement.executeQuery(AbstractJdbc2Statement.java:252)
at org.apache.commons.dbcp.DelegatingStatement.executeQuery(DelegatingStatement.java:208)
at org.apache.commons.dbcp.DelegatingStatement.executeQuery(DelegatingStatement.java:208)
at org.geotools.jdbc.JDBCFeatureReader.<init>(JDBCFeatureReader.java:150)
at org.geotools.jdbc.JDBCFeatureSource.getReaderInternal(JDBCFeatureSource.java:567)
... 101 more
**Caused by: java.io.EOFException**
at org.postgresql.core.PGStream.ReceiveChar(PGStream.java:261)
at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:1620)
at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:257)






Caused by: org.postgresql.util.PSQLException: **An I/O error occured while sending to the backend.**
at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:283)
at org.postgresql.jdbc2.AbstractJdbc2Statement.execute(AbstractJdbc2Statement.java:479)
at org.postgresql.jdbc2.AbstractJdbc2Statement.executeWithFlags(AbstractJdbc2Statement.java:353)
at org.postgresql.jdbc2.AbstractJdbc2Statement.executeQuery(AbstractJdbc2Statement.java:252)
at org.apache.commons.dbcp.DelegatingStatement.executeQuery(DelegatingStatement.java:208)
at org.apache.commons.dbcp.DelegatingStatement.executeQuery(DelegatingStatement.java:208)
at org.geotools.jdbc.JDBCFeatureReader.<init>(JDBCFeatureReader.java:150)
at org.geotools.jdbc.JDBCFeatureSource.getReaderInternal(JDBCFeatureSource.java:567)
... 101 more
**Caused by: java.net.SocketException: Connection reset**
at java.net.SocketInputStream.read(Unknown Source)
at java.net.SocketInputStream.read(Unknown Source)
at org.postgresql.core.VisibleBufferedInputStream.readMore(VisibleBufferedInputStream.java:135)
at org.postgresql.core.VisibleBufferedInputStream.ensureBytes(VisibleBufferedInputStream.java:104)
at org.postgresql.core.VisibleBufferedInputStream.read(VisibleBufferedInputStream.java:73)
at org.postgresql.core.PGStream.ReceiveChar(PGStream.java:259)
at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:1620)
at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:257)

可能是什么问题。有什么我需要在我的休眠配置文件或任何代码问题中更改它。请给我你的建议？

在下面找到我的休眠配置

<property name="hibernate.c3p0.min_size">5</property>
    <property name="hibernate.c3p0.max_size">20</property>
    <property name="hibernate.c3p0.timeout">5000</property>
    <property name="hibernate.c3p0.max_statements">0</property>
    <property name="hibernate.c3p0.idle_test_period">3000</property>

请在下面找到我的postgreSQL日志

2014-02-19 07:22:35 IST LOG:  server process (PID 74813) was terminated by signal 6: Aborted
2014-02-19 07:22:35 IST LOG:  terminating any other active server processes
2014-02-19 07:22:35 IST WARNING:  terminating connection because of crash of another server process
2014-02-19 07:22:35 IST DETAIL:  The postmaster has commanded this server process to roll back the current transaction and exit, because another server process exited abnormally and possibly corrupted shared memory.
2014-02-19 07:22:35 IST HINT:  In a moment you should be able to reconnect to the database and repeat your command.
2014-02-19 07:22:35 IST WARNING:  terminating connection because of crash of another server process
2014-02-19 07:22:35 IST DETAIL:  The postmaster has commanded this server process to roll back the current transaction and exit, because another server process exited abnormally and possibly corrupted shared memory.
2014-02-19 07:22:35 IST HINT:  In a moment you should be able to reconnect to the database and repeat your command.
2014-02-19 07:22:35 IST LOG:  all server processes terminated; reinitializing
2014-02-19 07:22:35 IST LOG:  database system was interrupted; last known up at 2014-02-19 07:22:29 IST
2014-02-19 07:22:35 IST LOG:  database system was not properly shut down; automatic recovery in progress
2014-02-19 07:22:35 IST LOG:  record with zero length at 0/16D89BB0
2014-02-19 07:22:35 IST LOG:  redo is not required
2014-02-19 07:22:35 IST LOG:  autovacuum launcher started
2014-02-19 07:22:35 IST LOG:  database system is ready to accept connections


2014-02-19 11:17:59 IST LOG:  unexpected EOF on client connection
2014-02-19 11:17:59 IST LOG:  unexpected EOF on client connection
2014-02-19 11:17:59 IST LOG:  unexpected EOF on client connection
2014-02-19 11:17:59 IST LOG:  unexpected EOF on client connection
2014-02-19 11:17:59 IST LOG:  unexpected EOF on client connection
2014-02-19 11:17:59 IST LOG:  unexpected EOF on client connection
2014-02-19 11:17:59 IST LOG:  unexpected EOF on client connection
2014-02-19 11:17:59 IST LOG:  unexpected EOF on client connection

My Server OS 是 - Red Hat Enterprise Linux 6 64 位和 postgreSQL 版本 - postgreSQL 9.1

答案 1

好吧，这很有趣：

2014-02-19 07：22：35 IST 日志：服务器进程（PID 74813）被信号 6 终止：中止

这表明PostgreSQL服务器后端正在崩溃。具体而言，信号 6 （SIGABRT）由断言失败触发，使代码故意崩溃，因为出现问题，并且无法继续操作而不会造成数据损坏的风险。

如果您没有运行PostgreSQL版本的最新补丁版本（您没有提到），请立即更新。

（其余的确实是更多的问题，但SO的格式有时会使评论过于严格）：

我建议使用至少包含后端 pid 和事务 ID 的启用。然后重新加载PostgreSQL以使设置处于活动状态。下次出现问题时，请查看查询日志，了解崩溃进程在崩溃时正在执行的内容。查看在控制台上以交互方式运行相同的语句是否也会导致崩溃。log_statement = alllog_line_prefix

我还建议启用核心转储文件并下载PostgreSQL版本的调试信息包。这将允许您将调试器附加到包含服务器崩溃时的状态的文件，并希望看到出了什么问题。如何启用核心转储是特定于操作系统/发行版的，您没有提到您的操作系统和版本，因此我无法提供更具体的说明;见谷歌。

答案 2

根据postgresql文档，你遇到了connection_failure问题。因此，请检查以下步骤，

将连接配置签入休眠配置文件
检查数据库连接是否已打开。
检查网络连接
以上都不行，请再次发布您的postgressql日志文件