Question

我们经常会收到此错误，数据库正在进入恢复模式，应用程序用尽了所有连接。约3至5分钟后，它会恢复。这是无法接受的。

应用程序异常：

      at com.mchange.v2.sql.SqlUtils.toSQLException(SqlUtils.java:118)
      at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:692)
      at com.mchange.v2.c3p0.impl.AbstractPoolBackedDataSource.getConnection(AbstractPoolBackedDataSource.java:140)
      at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
      at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199)
      at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
      at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:470)
      at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
      at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:80)
      at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:624)
      at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
      at org.apache.catalina.valves.RemoteIpValve.invoke(RemoteIpValve.java:677)
      at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342)
      at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:799)
      at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
      at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:861)
      at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1458)
      at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
      at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
      at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
      at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
      at java.lang.Thread.run(Thread.java:748)
Caused by: com.mchange.v2.resourcepool.CannotAcquireResourceException: A ResourcePool could not acquire a resource from its primary factory or source.
      at com.mchange.v2.resourcepool.BasicResourcePool.awaitAvailable(BasicResourcePool.java:1469)
      at com.mchange.v2.resourcepool.BasicResourcePool.prelimCheckoutResource(BasicResourcePool.java:644)
      at com.mchange.v2.resourcepool.BasicResourcePool.checkoutResource(BasicResourcePool.java:554)
      at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutAndMarkConnectionInUse(C3P0PooledConnectionPool.java:758)
      at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:685)
      ... 34 more
Caused by: org.postgresql.util.PSQLException: FATAL: the database system is in recovery mode
      at org.postgresql.core.v3.ConnectionFactoryImpl.doAuthentication(ConnectionFactoryImpl.java:463)
      at org.postgresql.core.v3.ConnectionFactoryImpl.openConnectionImpl(ConnectionFactoryImpl.java:203)
      at org.postgresql.core.ConnectionFactory.openConnection(ConnectionFactory.java:49)
      at org.postgresql.jdbc.PgConnection.<init>(PgConnection.java:195)
      at org.postgresql.Driver.makeConnection(Driver.java:454)
      at org.postgresql.Driver.connect(Driver.java:256)
      at com.mchange.v2.c3p0.DriverManagerDataSource.getConnection(DriverManagerDataSource.java:175)
      at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:220)
      at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.acquireResource(C3P0PooledConnectionPool.java:214)
      at com.mchange.v2.resourcepool.BasicResourcePool.doAcquire(BasicResourcePool.java:1138)
      at com.mchange.v2.resourcepool.BasicResourcePool.doAcquireAndDecrementPendingAcquiresWithinLockOnSuccess(BasicResourcePool.java:1125)
      at com.mchange.v2.resourcepool.BasicResourcePool.access$700(BasicResourcePool.java:44)
      at com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask.run(BasicResourcePool.java:1870)
      at com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:696)

不幸的是，Stackdriver日志中没有错误，警告。检查维护窗口和备份计划，它们都与这些“处于恢复模式的数据库”事件不符。

Answer 1

很遗憾，由于没有有用的日志可以指导我们了解导致问题的原因，因此建议您在Google Cloud Platform support中打开一个案例。我与支持团队合作，我们将通过调查Cloud SQL实例为您提供进一步的帮助。

Answer 2

我遇到了同样的问题并联系了 Google Cloud 支持。这是因为开启了 Query Insights。

<块引用>

当 Query Insights 处于活动状态时会发生这种情况，并且在查看之后您的实例我注意到它启用了 Query Insights。到禁用此功能，请按照以下步骤操作：

1 - 登录 GCP Console。 2 - 单击实例名称，然后转到概览页面。 3 - 在配置部分，单击编辑配置。 4 - 搜索有关配置的查询见解选项 5 - 取消选中启用查询洞察 6 - 单击保存。 7 - 尝试运行架构更改命令。

PostgreSQL数据库定期处于恢复模式

2 个答案: