昨天AWS的RDS崩溃了，我们的数据库也随之宕机。
当发生这种情况时，C3P0会尝试获取数据库连接并挂起。我希望在这些情况下，我的应用程序能够返回一个错误页面，而不是永远等待响应。
以下是代码示例：
ComboPooledDataSource db = new ComboPooledDataSource();
...
Connection conn = db.getConnection();
如何为从c3p0连接池获取连接设置超时时间？
我原以为checkoutTimeout()方法就是用来设置超时时间的，但实际上它并不是。该方法是“客户端在连接池耗尽时调用getConnection()将等待一个Connection被检入或获取的毫秒数。”由于连接池没有耗尽（只是不可用），因此该方法不适用。
我还以为setAcquireRetryAttempts和setAcquireIncrement会起作用，但它们并不会，因为连接并没有失败，而只是没有响应。
当我查看整个堆栈时，程序停滞在这里：
SocketInputStream.socketRead0(FileDescriptor, byte[], int, int, int) line: not available [native method]
SocketInputStream.read(byte[], int, int) line: 129
ReadAheadInputStream.fill(int) line: 113
ReadAheadInputStream.readFromUnderlyingStreamIfNecessary(byte[], int, int) line: 160
ReadAheadInputStream.read(byte[], int, int) line: 188
MysqlIO.readFully(InputStream, byte[], int, int) line: 2428
MysqlIO.reuseAndReadPacket(Buffer, int) line: 2882
MysqlIO.reuseAndReadPacket(Buffer) line: 2871
MysqlIO.checkErrorPacket(int) line: 3414
MysqlIO.sendCommand(int, String, Buffer, boolean, String) line: 1936
MysqlIO.sqlQueryDirect(StatementImpl, String, String, Buffer, int, int, int, boolean, String, Field[]) line: 2060
JDBC4Connection(ConnectionImpl).execSQL(StatementImpl, String, int, Buffer, int, int, boolean, String, Field[], boolean) line: 2542
JDBC4PreparedStatement(PreparedStatement).executeInternal(int, Buffer, boolean, boolean, Field[], boolean) line: 1734
JDBC4PreparedStatement(PreparedStatement).executeQuery() line: 1885
NewProxyPreparedStatement.executeQuery() line: 76
C3P0PooledConnectionPoolManager.initializeAutomaticTestTable(String, DbAuth) line: 799
C3P0PooledConnectionPoolManager.createPooledConnectionPool(DbAuth) line: 696
C3P0PooledConnectionPoolManager.getPool(DbAuth) line: 257
C3P0PooledConnectionPoolManager.getPool() line: 271
ComboPooledDataSource(AbstractPoolBackedDataSource).getNumThreadsAwaitingCheckoutDefaultUser() line: 203
NativeMethodAccessorImpl.invoke0(Method, Object, Object[]) line: not available [native method]
NativeMethodAccessorImpl.invoke(Object, Object[]) line: 39
DelegatingMethodAccessorImpl.invoke(Object, Object[]) line: 25
Method.invoke(Object, Object...) line: 597
BeansUtils.extractAccessiblePropertiesToMap(Map, Object, Collection) line: 359
BeansUtils.appendPropNamesAndValues(StringBuffer, Object, Collection) line: 324
ComboPooledDataSource.toString() line: 539
ComboPooledDataSource(AbstractPoolBackedDataSource).getPoolManager() line: 462
ComboPooledDataSource(AbstractPoolBackedDataSource).getConnection() line: 128
当我在谷歌上搜索“socketRead0 timeout”和“socketRead0 hang”时，我看到了很多问题，但没有真正的解决方案。
有没有办法在这里强制设置超时时间？