从 MySQL 5.5 升级到 5.6 并获得 "SQLException: Connection is closed"
Upgrading from MySQL 5.5 to 5.6 and getting "SQLException: Connection is closed"
我正在使用带有 eBean 的 Play 框架。升级到 MySQL 5.6 在 运行 我的数据库演变时导致了以下异常：
java.sql.SQLException: Connection is closed!
com.jolbox.bonecp.ConnectionHandle.checkClosed(ConnectionHandle.java:459)
com.jolbox.bonecp.ConnectionHandle.prepareStatement(ConnectionHandle.java:1011)
play.api.db.evolutions.Evolutions$.prepare(Evolutions.scala:128)
play.api.db.evolutions.Evolutions$.updateLastProblem(Evolutions.scala:247)
play.api.db.evolutions.Evolutions$.applyScript(Evolutions.scala:289)
play.api.db.evolutions.EvolutionsPlugin.handleWebCommand(Evolutions.scala:584)
play.core.ReloadableApplication$$anonfun$handleWebCommand$$anonfun$apply$$anonfun$apply.apply(ApplicationProvider.scala:193)
play.core.ReloadableApplication$$anonfun$handleWebCommand$$anonfun$apply$$anonfun$apply.apply(ApplicationProvider.scala:192)
scala.collection.LinearSeqOptimized$class.foldLeft(LinearSeqOptimized.scala:110)
scala.collection.immutable.List.foldLeft(List.scala:83)
play.core.ReloadableApplication$$anonfun$handleWebCommand$$anonfun$apply.apply(ApplicationProvider.scala:192)
play.core.ReloadableApplication$$anonfun$handleWebCommand$$anonfun$apply.apply(ApplicationProvider.scala:191)
scala.Option.flatMap(Option.scala:170)
play.core.ReloadableApplication$$anonfun$handleWebCommand.apply(ApplicationProvider.scala:191)
play.core.ReloadableApplication$$anonfun$handleWebCommand.apply(ApplicationProvider.scala:191)
scala.Option.orElse(Option.scala:266)
play.core.ReloadableApplication.handleWebCommand(ApplicationProvider.scala:189)
play.core.server.Server$$anonfun$getHandlerFor.apply(Server.scala:69)
play.core.server.Server$$anonfun$getHandlerFor.apply(Server.scala:69)
scala.util.control.Exception$Catch$$anonfun$either.apply(Exception.scala:125)
scala.util.control.Exception$Catch$$anonfun$either.apply(Exception.scala:125)
scala.util.control.Exception$Catch.apply(Exception.scala:103)
scala.util.control.Exception$Catch.either(Exception.scala:125)
play.core.server.Server$class.getHandlerFor(Server.scala:69)
play.core.server.NettyServer.getHandlerFor(NettyServer.scala:37)
play.core.server.netty.PlayDefaultUpstreamHandler$$anonfun.apply(PlayDefaultUpstreamHandler.scala:157)
play.core.server.netty.PlayDefaultUpstreamHandler$$anonfun.apply(PlayDefaultUpstreamHandler.scala:157)
scala.util.Either.fold(Either.scala:99)
play.core.server.netty.PlayDefaultUpstreamHandler.messageReceived(PlayDefaultUpstreamHandler.scala:142)
org.jboss.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:70)
org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)
org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:791)
com.typesafe.netty.http.pipelining.HttpPipeliningHandler.messageReceived(HttpPipeliningHandler.java:62)
org.jboss.netty.channel.SimpleChannelHandler.handleUpstream(SimpleChannelHandler.java:88)
org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)
org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:791)
org.jboss.netty.handler.codec.http.HttpContentDecoder.messageReceived(HttpContentDecoder.java:108)
org.jboss.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:70)
org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)
org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:791)
org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:296)
org.jboss.netty.handler.codec.frame.FrameDecoder.unfoldAndFireMessageReceived(FrameDecoder.java:459)
org.jboss.netty.handler.codec.replay.ReplayingDecoder.callDecode(ReplayingDecoder.java:536)
org.jboss.netty.handler.codec.replay.ReplayingDecoder.messageReceived(ReplayingDecoder.java:435)
org.jboss.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:70)
org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)
org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:559)
org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:268)
org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:255)
org.jboss.netty.channel.socket.nio.NioWorker.read(NioWorker.java:88)
org.jboss.netty.channel.socket.nio.AbstractNioWorker.process(AbstractNioWorker.java:108)
org.jboss.netty.channel.socket.nio.AbstractNioSelector.run(AbstractNioSelector.java:318)
org.jboss.netty.channel.socket.nio.AbstractNioWorker.run(AbstractNioWorker.java:89)
org.jboss.netty.channel.socket.nio.NioWorker.run(NioWorker.java:178)
org.jboss.netty.util.ThreadRenamingRunnable.run(ThreadRenamingRunnable.java:108)
org.jboss.netty.util.internal.DeadLockProofWorker.run(DeadLockProofWorker.java:42)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
java.lang.Thread.run(Thread.java:745)
我在应用程序日志中也发现了这个：
2015-01-29 09:13:03,742 - [ERROR] - from com.jolbox.bonecp.ConnectionHandle in New I/O worker #1
Database access problem. Killing off this connection and all remaining connections in the connection pool. SQL State = HY000
我试过 mysql-connector-java 5.1.18 和 5.1.34，我试过 Play 2.3.6 和 2.3.4。除了使用 MySQL 5.5 而不是 5.6.
似乎没有什么可以解决这个问题
从 bonecp 打开日志记录后，我能够确定哪个 SQL 语句导致连接关闭。我试图在不删除外键的情况下更改外键列。 MySQL 5.5 有效而 5.6 无效的原因如下（来自 5.6 中的发行说明）：
As of 5.6.7, the server prohibits changes to foreign key columns with the potential to cause loss of referential integrity. A workaround is to use ALTER TABLE ... DROP FOREIGN KEY before changing the column definition and ALTER TABLE ... ADD FOREIGN KEY afterward.
我正在使用带有 eBean 的 Play 框架。升级到 MySQL 5.6 在 运行 我的数据库演变时导致了以下异常：
java.sql.SQLException: Connection is closed!
com.jolbox.bonecp.ConnectionHandle.checkClosed(ConnectionHandle.java:459)
com.jolbox.bonecp.ConnectionHandle.prepareStatement(ConnectionHandle.java:1011)
play.api.db.evolutions.Evolutions$.prepare(Evolutions.scala:128)
play.api.db.evolutions.Evolutions$.updateLastProblem(Evolutions.scala:247)
play.api.db.evolutions.Evolutions$.applyScript(Evolutions.scala:289)
play.api.db.evolutions.EvolutionsPlugin.handleWebCommand(Evolutions.scala:584)
play.core.ReloadableApplication$$anonfun$handleWebCommand$$anonfun$apply$$anonfun$apply.apply(ApplicationProvider.scala:193)
play.core.ReloadableApplication$$anonfun$handleWebCommand$$anonfun$apply$$anonfun$apply.apply(ApplicationProvider.scala:192)
scala.collection.LinearSeqOptimized$class.foldLeft(LinearSeqOptimized.scala:110)
scala.collection.immutable.List.foldLeft(List.scala:83)
play.core.ReloadableApplication$$anonfun$handleWebCommand$$anonfun$apply.apply(ApplicationProvider.scala:192)
play.core.ReloadableApplication$$anonfun$handleWebCommand$$anonfun$apply.apply(ApplicationProvider.scala:191)
scala.Option.flatMap(Option.scala:170)
play.core.ReloadableApplication$$anonfun$handleWebCommand.apply(ApplicationProvider.scala:191)
play.core.ReloadableApplication$$anonfun$handleWebCommand.apply(ApplicationProvider.scala:191)
scala.Option.orElse(Option.scala:266)
play.core.ReloadableApplication.handleWebCommand(ApplicationProvider.scala:189)
play.core.server.Server$$anonfun$getHandlerFor.apply(Server.scala:69)
play.core.server.Server$$anonfun$getHandlerFor.apply(Server.scala:69)
scala.util.control.Exception$Catch$$anonfun$either.apply(Exception.scala:125)
scala.util.control.Exception$Catch$$anonfun$either.apply(Exception.scala:125)
scala.util.control.Exception$Catch.apply(Exception.scala:103)
scala.util.control.Exception$Catch.either(Exception.scala:125)
play.core.server.Server$class.getHandlerFor(Server.scala:69)
play.core.server.NettyServer.getHandlerFor(NettyServer.scala:37)
play.core.server.netty.PlayDefaultUpstreamHandler$$anonfun.apply(PlayDefaultUpstreamHandler.scala:157)
play.core.server.netty.PlayDefaultUpstreamHandler$$anonfun.apply(PlayDefaultUpstreamHandler.scala:157)
scala.util.Either.fold(Either.scala:99)
play.core.server.netty.PlayDefaultUpstreamHandler.messageReceived(PlayDefaultUpstreamHandler.scala:142)
org.jboss.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:70)
org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)
org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:791)
com.typesafe.netty.http.pipelining.HttpPipeliningHandler.messageReceived(HttpPipeliningHandler.java:62)
org.jboss.netty.channel.SimpleChannelHandler.handleUpstream(SimpleChannelHandler.java:88)
org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)
org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:791)
org.jboss.netty.handler.codec.http.HttpContentDecoder.messageReceived(HttpContentDecoder.java:108)
org.jboss.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:70)
org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)
org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:791)
org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:296)
org.jboss.netty.handler.codec.frame.FrameDecoder.unfoldAndFireMessageReceived(FrameDecoder.java:459)
org.jboss.netty.handler.codec.replay.ReplayingDecoder.callDecode(ReplayingDecoder.java:536)
org.jboss.netty.handler.codec.replay.ReplayingDecoder.messageReceived(ReplayingDecoder.java:435)
org.jboss.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:70)
org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)
org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:559)
org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:268)
org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:255)
org.jboss.netty.channel.socket.nio.NioWorker.read(NioWorker.java:88)
org.jboss.netty.channel.socket.nio.AbstractNioWorker.process(AbstractNioWorker.java:108)
org.jboss.netty.channel.socket.nio.AbstractNioSelector.run(AbstractNioSelector.java:318)
org.jboss.netty.channel.socket.nio.AbstractNioWorker.run(AbstractNioWorker.java:89)
org.jboss.netty.channel.socket.nio.NioWorker.run(NioWorker.java:178)
org.jboss.netty.util.ThreadRenamingRunnable.run(ThreadRenamingRunnable.java:108)
org.jboss.netty.util.internal.DeadLockProofWorker.run(DeadLockProofWorker.java:42)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
java.lang.Thread.run(Thread.java:745)
我在应用程序日志中也发现了这个：
2015-01-29 09:13:03,742 - [ERROR] - from com.jolbox.bonecp.ConnectionHandle in New I/O worker #1
Database access problem. Killing off this connection and all remaining connections in the connection pool. SQL State = HY000
我试过 mysql-connector-java 5.1.18 和 5.1.34，我试过 Play 2.3.6 和 2.3.4。除了使用 MySQL 5.5 而不是 5.6.
似乎没有什么可以解决这个问题从 bonecp 打开日志记录后，我能够确定哪个 SQL 语句导致连接关闭。我试图在不删除外键的情况下更改外键列。 MySQL 5.5 有效而 5.6 无效的原因如下（来自 5.6 中的发行说明）：
As of 5.6.7, the server prohibits changes to foreign key columns with the potential to cause loss of referential integrity. A workaround is to use ALTER TABLE ... DROP FOREIGN KEY before changing the column definition and ALTER TABLE ... ADD FOREIGN KEY afterward.