当我们推送到Gerrit时，我们会不时收到内部服务器错误。在日志中，我们看到在事务完成之前连接已关闭的连接。 （见下面的日志）
我们使用具有以下设置的Oracle DB：
[database]
type = ORACLE
poolmaxidle = 16
database = db/ReviewDB
port = 1521
instance = infrapd1
hostname = HOSTNAME
connectionpool = true
username = USERNAME
poollimit = 32
dataSourceInterceptorClass = com.googlesource.gerrit.plugins.javamelody.MonitoringDataSourceInterceptor
在日志中，当我们收到内部服务器错误时，我们会看到类似这样的错误：
[2015-02-13 15:49:51,505] ERROR com.google.gerrit.server.git.ReceiveCommits : Can't insert change/patchset for PROJECT
com.google.gerrit.server.git.InsertException: Error inserting change/patchset
at com.google.gerrit.server.git.ReceiveCommits$1.apply(ReceiveCommits.java:258)
at com.google.gerrit.server.git.ReceiveCommits$1.apply(ReceiveCommits.java:249)
at com.google.common.util.concurrent.Futures$MappingCheckedFuture.mapException(Futures.java:1672)
at com.google.common.util.concurrent.AbstractCheckedFuture.checkedGet(AbstractCheckedFuture.java:85)
at com.google.gerrit.server.git.ReceiveCommits.insertChangesAndPatchSets(ReceiveCommits.java:756)
at com.google.gerrit.server.git.ReceiveCommits.processCommands(ReceiveCommits.java:564)
at com.google.gerrit.server.git.AsyncReceiveCommits$Worker.run(AsyncReceiveCommits.java:90)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
at com.google.gerrit.server.util.RequestScopePropagator$5.call(RequestScopePropagator.java:222)
at com.google.gerrit.server.util.RequestScopePropagator$4.call(RequestScopePropagator.java:201)
at com.google.gerrit.server.util.ThreadLocalRequestScopePropagator$1.call(ThreadLocalRequestScopePropagator.java:55)
at com.google.gerrit.server.util.RequestScopePropagator$1.call(RequestScopePropagator.java:98)
at com.google.gerrit.server.util.RequestScopePropagator$2.run(RequestScopePropagator.java:131)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:178)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:292)
at com.google.gerrit.server.git.WorkQueue$Task.run(WorkQueue.java:364)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:744)
Caused by: java.util.concurrent.ExecutionException: com.google.gwtorm.server.OrmException: Cannot set auto commit mode
at java.util.concurrent.FutureTask.report(FutureTask.java:122)
at java.util.concurrent.FutureTask.get(FutureTask.java:188)
at com.google.common.util.concurrent.ForwardingFuture.get(ForwardingFuture.java:63)
at com.google.common.util.concurrent.AbstractCheckedFuture.checkedGet(AbstractCheckedFuture.java:78)
... 17 more
Caused by: com.google.gwtorm.server.OrmException: Cannot set auto commit mode
at com.google.gwtorm.jdbc.JdbcSchema.rollback(JdbcSchema.java:80)
at com.google.gerrit.server.change.ChangeInserter.insert(ChangeInserter.java:177)
at com.google.gerrit.server.git.ReceiveCommits$CreateRequest.insertChange(ReceiveCommits.java:1585)
at com.google.gerrit.server.git.ReceiveCommits$CreateRequest.access$800(ReceiveCommits.java:1520)
at com.google.gerrit.server.git.ReceiveCommits$CreateRequest$1.call(ReceiveCommits.java:1551)
at com.google.gerrit.server.git.ReceiveCommits$CreateRequest$1.call(ReceiveCommits.java:1547)
at com.google.gerrit.server.util.RequestScopePropagator$1.call(RequestScopePropagator.java:96)
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
at com.google.common.util.concurrent.MoreExecutors$SameThreadExecutorService.execute(MoreExecutors.java:297)
at java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:132)
at com.google.common.util.concurrent.AbstractListeningExecutorService.submit(AbstractListeningExecutorService.java:58)
at com.google.gerrit.server.git.ReceiveCommits$CreateRequest.insertChange(ReceiveCommits.java:1546)
at com.google.gerrit.server.git.ReceiveCommits.insertChangesAndPatchSets(ReceiveCommits.java:752)
... 16 more
Caused by: java.sql.SQLRecoverableException: Closed Connection
at oracle.jdbc.driver.PhysicalConnection.setAutoCommit(PhysicalConnection.java:3790)
at org.apache.commons.dbcp.DelegatingConnection.setAutoCommit(DelegatingConnection.java:371)
at org.apache.commons.dbcp.PoolingDataSource$PoolGuardConnectionWrapper.setAutoCommit(PoolingDataSource.java:328)
at sun.reflect.GeneratedMethodAccessor69.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at net.bull.javamelody.JdbcWrapper$ConnectionInvocationHandler.invoke(JdbcWrapper.java:188)
at net.bull.javamelody.JdbcWrapper$DelegatingInvocationHandler.invoke(JdbcWrapper.java:285)
at com.sun.proxy.$Proxy17.setAutoCommit(Unknown Source)
at com.google.gwtorm.jdbc.JdbcSchema.rollback(JdbcSchema.java:78)
... 28 more
有关如何解决此问题的任何建议？有关如何改进数据库设置或调试错误的任何建议？任何指针都非常感激。