Apache Derby示例数据库问题; ＆＃39;无法连接＆＃39;

时间：2016-01-23 13:56:58

标签： java derby

我在Windows 10 Pro 64位上运行Netbeans 8.02，有一天我发现我无法访问＆＃39;示例＆＃39; Derby数据库不再。我收到以下错误：

  

无法连接。无法与jdbc：derby：// localhost：1527 / sample using建立连接   org.apache.derby.jdbc.ClientDriver（DERBY SQL错误：ERRORCODE：40000，SQLSTATE：XJ040，SQLERRMC：   无法启动数据库＆＃39;示例＆＃39;使用类加载器sun.misc.Launcher$AppClassLoader@60e53b93，请参阅   详细信息的下一个异常。:: SQLSTATE：XSLAM）。

Apache Derby正在运行，否则它似乎处于良好的工作状态。唯一使用＆＃39;样本＆＃39;数据库是完成的教程中的应用程序：Enterprise application tutorial

这是我能想到的唯一可能导致此错误的事情。 提前谢谢。

1 个答案:

答案 0 :(得分：0)

感谢您的回复。这是我在日志中找到的内容：

        Sat Jan 23 13:30:29 GMT 2016:
    Booting Derby version The Apache Software Foundation 
    - Apache Derby - 10.11.1.2 - (1629631): instancE f67740d7-0152-6ead-        1de3-00003d273097 

    on database directory C:\Users\user\.netbeans-derby\sample with class loader 
    sun.misc.Launcher$AppClassLoader@60e53b93 
    Loaded from file:
    /C:/Program%20Files/Java/jdk1.8.0_40/db/lib/derby.jar
    java.vendor=Oracle Corporation
    java.runtime.version=1.8.0_40-b25
    user.
    dir=C:\Program Files\Java\jdk1.8.0_40\db
    os.name=Windows 8.1
    os.arch=amd64
    os.version=6.3
    derby.system.home=C:\Users\user\.netbeans-derby

    ------------  Begin Shutdown Error Stack -------------

    ERROR XSLA7: Cannot redo operation null in the log.
    at org.apache.derby.iapi.error.StandardException.newException(Unknown Source)
    at org.apache.derby.impl.store.raw.log.FileLogger.redo(Unknown Source)
    at org.apache.derby.impl.store.raw.log.LogToFile.recover(Unknown Source)
    at org.apache.derby.impl.store.raw.RawStore.boot(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.boot(Unknown Source)
    at org.apache.derby.impl.services.monitor.TopService.bootModule(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.startModule(Unknown Source)
    at org.apache.derby.impl.services.monitor.FileMonitor.startModule(Unknown Source)
    at org.apache.derby.iapi.services.monitor.Monitor.bootServiceModule(Unknown Source)
    at org.apache.derby.impl.store.access.RAMAccessManager.boot(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.boot(Unknown Source)
    at org.apache.derby.impl.services.monitor.TopService.bootModule(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.startModule(Unknown Source)
    at org.apache.derby.impl.services.monitor.FileMonitor.startModule(Unknown Source)
    at org.apache.derby.iapi.services.monitor.Monitor.bootServiceModule(Unknown Source)
    at org.apache.derby.impl.db.BasicDatabase.bootStore(Unknown Source)
    at org.apache.derby.impl.db.BasicDatabase.boot(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.boot(Unknown Source)
    at org.apache.derby.impl.services.monitor.TopService.bootModule(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.bootService(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.startProviderService(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.findProviderAndStartService(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.startPersistentService(Unknown Source)
    at org.apache.derby.iapi.services.monitor.Monitor.startPersistentService(Unknown Source)
    at org.apache.derby.impl.jdbc.EmbedConnection.bootDatabase(Unknown Source)
    at org.apache.derby.impl.jdbc.EmbedConnection.<init>(Unknown Source)
    at org.apache.derby.jdbc.InternalDriver.getNewEmbedConnection(Unknown Source)
    at org.apache.derby.jdbc.InternalDriver.connect(Unknown Source)
    at org.apache.derby.jdbc.InternalDriver.connect(Unknown Source)
    at org.apache.derby.jdbc.EmbeddedDriver.connect(Unknown Source)
    at org.apache.derby.impl.drda.Database.makeConnection(Unknown Source)
    at org.apache.derby.impl.drda.DRDAConnThread.getConnFromDatabaseName(Unknown Source)
    at org.apache.derby.impl.drda.DRDAConnThread.verifyUserIdPassword(Unknown Source)
    at org.apache.derby.impl.drda.DRDAConnThread.parseSECCHK(Unknown Source)
    at org.apache.derby.impl.drda.DRDAConnThread.parseDRDAConnection(Unknown Source)
    at org.apache.derby.impl.drda.DRDAConnThread.processCommands(Unknown Source)
    at org.apache.derby.impl.drda.DRDAConnThread.run(Unknown Source)
    Caused by: ERROR XSLAM: Cannot verify database format at {1} due to IOException: C:\Users\user\.netbeans-derby\sample
    at org.apache.derby.iapi.error.StandardException.newException(Unknown Source)
    at org.apache.derby.impl.store.raw.log.LogToFile.verifyLogFormat(Unknown Source)
    at org.apache.derby.impl.store.raw.log.LogToFile.getLogFileAtPosition(Unknown Source)
    at org.apache.derby.impl.store.raw.log.LogToFile.getLogFileAtBeginning(Unknown Source)
    at org.apache.derby.impl.store.raw.log.Scan.getNextRecordForward(Unknown Source)
    at org.apache.derby.impl.store.raw.log.Scan.getNextRecord(Unknown Source)
    ... 36 more
    Caused by: java.io.EOFException
    at java.io.RandomAccessFile.readInt(RandomAccessFile.java:803)
    ... 41 more
    ============= begin nested exception, level (1) ===========
    ERROR XSLAM: Cannot verify database format at {1} due to IOException: C:\Users\user\.netbeans-derby\sample
    at org.apache.derby.iapi.error.StandardException.newException(Unknown Source)
    at org.apache.derby.impl.store.raw.log.LogToFile.verifyLogFormat(Unknown Source)
    at org.apache.derby.impl.store.raw.log.LogToFile.getLogFileAtPosition(Unknown Source)
    at org.apache.derby.impl.store.raw.log.LogToFile.getLogFileAtBeginning(Unknown Source)
    at org.apache.derby.impl.store.raw.log.Scan.getNextRecordForward(Unknown Source)
    at org.apache.derby.impl.store.raw.log.Scan.getNextRecord(Unknown Source)
    at org.apache.derby.impl.store.raw.log.FileLogger.redo(Unknown Source)
    at org.apache.derby.impl.store.raw.log.LogToFile.recover(Unknown Source)
    at org.apache.derby.impl.store.raw.RawStore.boot(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.boot(Unknown Source)
    at org.apache.derby.impl.services.monitor.TopService.bootModule(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.startModule(Unknown Source)
    at org.apache.derby.impl.services.monitor.FileMonitor.startModule(Unknown Source)
    at org.apache.derby.iapi.services.monitor.Monitor.bootServiceModule(Unknown Source)
    at org.apache.derby.impl.store.access.RAMAccessManager.boot(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.boot(Unknown Source)
    at org.apache.derby.impl.services.monitor.TopService.bootModule(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.startModule(Unknown Source)
    at org.apache.derby.impl.services.monitor.FileMonitor.startModule(Unknown Source)
    at org.apache.derby.iapi.services.monitor.Monitor.bootServiceModule(Unknown Source)
    at org.apache.derby.impl.db.BasicDatabase.bootStore(Unknown Source)
    at org.apache.derby.impl.db.BasicDatabase.boot(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.boot(Unknown Source)
    at org.apache.derby.impl.services.monitor.TopService.bootModule(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.bootService(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.startProviderService(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.findProviderAndStartService(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.startPersistentService(Unknown Source)
    at org.apache.derby.iapi.services.monitor.Monitor.startPersistentService(Unknown Source)
    at org.apache.derby.impl.jdbc.EmbedConnection.bootDatabase(Unknown Source)
    at org.apache.derby.impl.jdbc.EmbedConnection.<init>(Unknown Source)
    at org.apache.derby.jdbc.InternalDriver.getNewEmbedConnection(Unknown Source)
    at org.apache.derby.jdbc.InternalDriver.connect(Unknown Source)
    at org.apache.derby.jdbc.InternalDriver.connect(Unknown Source)
    at org.apache.derby.jdbc.EmbeddedDriver.connect(Unknown Source)
    at org.apache.derby.impl.drda.Database.makeConnection(Unknown Source)
    at org.apache.derby.impl.drda.DRDAConnThread.getConnFromDatabaseName(Unknown Source)
    at org.apache.derby.impl.drda.DRDAConnThread.verifyUserIdPassword(Unknown Source)
    at org.apache.derby.impl.drda.DRDAConnThread.parseSECCHK(Unknown Source)
    at org.apache.derby.impl.drda.DRDAConnThread.parseDRDAConnection(Unknown Source)
    at org.apache.derby.impl.drda.DRDAConnThread.processCommands(Unknown Source)
    at org.apache.derby.impl.drda.DRDAConnThread.run(Unknown Source)
    Caused by: java.io.EOFException
        at java.io.RandomAccessFile.readInt(RandomAccessFile.java:803)
        ... 41 more
    ============= end nested exception, level (1) ===========
    ============= begin nested exception, level (2) ===========
    java.io.EOFException
    at java.io.RandomAccessFile.readInt(RandomAccessFile.java:803)
    at org.apache.derby.impl.store.raw.log.LogToFile.verifyLogFormat(Unknown Source)
    at org.apache.derby.impl.store.raw.log.LogToFile.getLogFileAtPosition(Unknown Source)
    at org.apache.derby.impl.store.raw.log.LogToFile.getLogFileAtBeginning(Unknown Source)
    at org.apache.derby.impl.store.raw.log.Scan.getNextRecordForward(Unknown Source)
    at org.apache.derby.impl.store.raw.log.Scan.getNextRecord(Unknown Source)
    at org.apache.derby.impl.store.raw.log.FileLogger.redo(Unknown Source)
    at org.apache.derby.impl.store.raw.log.LogToFile.recover(Unknown Source)
    at org.apache.derby.impl.store.raw.RawStore.boot(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.boot(Unknown Source)
    at org.apache.derby.impl.services.monitor.TopService.bootModule(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.startModule(Unknown Source)
    at org.apache.derby.impl.services.monitor.FileMonitor.startModule(Unknown Source)
    at org.apache.derby.iapi.services.monitor.Monitor.bootServiceModule(Unknown Source)
    at org.apache.derby.impl.store.access.RAMAccessManager.boot(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.boot(Unknown Source)
    at org.apache.derby.impl.services.monitor.TopService.bootModule(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.startModule(Unknown Source)
    at org.apache.derby.impl.services.monitor.FileMonitor.startModule(Unknown Source)
    at org.apache.derby.iapi.services.monitor.Monitor.bootServiceModule(Unknown Source)
    at org.apache.derby.impl.db.BasicDatabase.bootStore(Unknown Source)
    at org.apache.derby.impl.db.BasicDatabase.boot(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.boot(Unknown Source)
    at org.apache.derby.impl.services.monitor.TopService.bootModule(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.bootService(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.startProviderService(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.findProviderAndStartService(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.startPersistentService(Unknown Source)
    at org.apache.derby.iapi.services.monitor.Monitor.startPersistentService(Unknown Source)
    at org.apache.derby.impl.jdbc.EmbedConnection.bootDatabase(Unknown Source)
    at org.apache.derby.impl.jdbc.EmbedConnection.<init>(Unknown Source)
    at org.apache.derby.jdbc.InternalDriver.getNewEmbedConnection(Unknown Source)
    at org.apache.derby.jdbc.InternalDriver.connect(Unknown Source)
    at org.apache.derby.jdbc.InternalDriver.connect(Unknown Source)
    at org.apache.derby.jdbc.EmbeddedDriver.connect(Unknown Source)
    at org.apache.derby.impl.drda.Database.makeConnection(Unknown Source)
    at org.apache.derby.impl.drda.DRDAConnThread.getConnFromDatabaseName(Unknown Source)
    at org.apache.derby.impl.drda.DRDAConnThread.verifyUserIdPassword(Unknown Source)
    at org.apache.derby.impl.drda.DRDAConnThread.parseSECCHK(Unknown Source)
    at org.apache.derby.impl.drda.DRDAConnThread.parseDRDAConnection(Unknown Source)
    at org.apache.derby.impl.drda.DRDAConnThread.processCommands(Unknown Source)
    at org.apache.derby.impl.drda.DRDAConnThread.run(Unknown Source)
    ============= end nested exception, level (2) ===========
    ------------  End Shutdown Error Stack -------------

    ----------------------------------------------------------------
    Sat Jan 23 13:30:29 GMT 2016:
    Shutting down instance f67740d7-0152-6ead-1de3-00003d273097 on database directory C:\Users\user\.netbeans-derby\sample with class loader sun.misc.Launcher$AppClassLoader@60e53b93 
    Sat Jan 23 13:30:29 GMT 2016 Thread[DRDAConnThread_3,5,main] Cleanup action starting
        java.sql.SQLException: Failed to start database 'sample' with class loader sun.misc.Launcher$AppClassLoader@60e53b93, see the next exception for details.
    at org.apache.derby.impl.jdbc.SQLExceptionFactory.getSQLException(Unknown Source)
    at org.apache.derby.impl.jdbc.SQLExceptionFactory.getSQLException(Unknown Source)
    at org.apache.derby.impl.jdbc.Util.seeNextException(Unknown Source)
    at org.apache.derby.impl.jdbc.EmbedConnection.bootDatabase(Unknown Source)
    at org.apache.derby.impl.jdbc.EmbedConnection.<init>(Unknown Source)
    at org.apache.derby.jdbc.InternalDriver.getNewEmbedConnection(Unknown Source)
    at org.apache.derby.jdbc.InternalDriver.connect(Unknown Source)
    at org.apache.derby.jdbc.InternalDriver.connect(Unknown Source)
    at org.apache.derby.jdbc.EmbeddedDriver.connect(Unknown Source)
    at org.apache.derby.impl.drda.Database.makeConnection(Unknown Source)
    at org.apache.derby.impl.drda.DRDAConnThread.getConnFromDatabaseName(Unknown Source)
    at org.apache.derby.impl.drda.DRDAConnThread.verifyUserIdPassword(Unknown Source)
    at org.apache.derby.impl.drda.DRDAConnThread.parseSECCHK(Unknown Source)
    at org.apache.derby.impl.drda.DRDAConnThread.parseDRDAConnection(Unknown Source)
    at org.apache.derby.impl.drda.DRDAConnThread.processCommands(Unknown Source)
    at org.apache.derby.impl.drda.DRDAConnThread.run(Unknown Source)
    Caused by: ERROR XJ040: Failed to start database 'sample' with class loader sun.misc.Launcher$AppClassLoader@60e53b93, see the next exception for details.
    at org.apache.derby.iapi.error.StandardException.newException(Unknown Source)
    at org.apache.derby.impl.jdbc.SQLExceptionFactory.wrapArgsForTransportAcrossDRDA(Unknown Source)
    ... 16 more
    Caused by: ERROR XSLAM: Cannot verify database format at {1} due to IOException: C:\Users\user\.netbeans-derby\sample
    at org.apache.derby.iapi.error.StandardException.newException(Unknown Source)
    at org.apache.derby.impl.store.raw.log.LogToFile.verifyLogFormat(Unknown Source)
    at org.apache.derby.impl.store.raw.log.LogToFile.getLogFileAtPosition(Unknown Source)
    at org.apache.derby.impl.store.raw.log.LogToFile.getLogFileAtBeginning(Unknown Source)
    at org.apache.derby.impl.store.raw.log.Scan.getNextRecordForward(Unknown Source)
    at org.apache.derby.impl.store.raw.log.Scan.getNextRecord(Unknown Source)
    at org.apache.derby.impl.store.raw.log.FileLogger.redo(Unknown Source)
    at org.apache.derby.impl.store.raw.log.LogToFile.recover(Unknown Source)
    at org.apache.derby.impl.store.raw.RawStore.boot(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.boot(Unknown Source)
    at org.apache.derby.impl.services.monitor.TopService.bootModule(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.startModule(Unknown Source)
    at org.apache.derby.impl.services.monitor.FileMonitor.startModule(Unknown Source)
    at org.apache.derby.iapi.services.monitor.Monitor.bootServiceModule(Unknown Source)
    at org.apache.derby.impl.store.access.RAMAccessManager.boot(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.boot(Unknown Source)
    at org.apache.derby.impl.services.monitor.TopService.bootModule(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.startModule(Unknown Source)
    at org.apache.derby.impl.services.monitor.FileMonitor.startModule(Unknown Source)
    at org.apache.derby.iapi.services.monitor.Monitor.bootServiceModule(Unknown Source)
    at org.apache.derby.impl.db.BasicDatabase.bootStore(Unknown Source)
    at org.apache.derby.impl.db.BasicDatabase.boot(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.boot(Unknown Source)
    at org.apache.derby.impl.services.monitor.TopService.bootModule(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.bootService(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.startProviderService(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.findProviderAndStartService(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.startPersistentService(Unknown Source)
    at org.apache.derby.iapi.services.monitor.Monitor.startPersistentService(Unknown Source)
    ... 13 more
    Caused by: java.io.EOFException
    at java.io.RandomAccessFile.readInt(RandomAccessFile.java:803)
    ... 41 more
    ============= begin nested exception, level (1) ===========
    java.sql.SQLException: Cannot verify database format at {1} due to IOException: 
    C:\Users\user\.netbeans-derby\sample
    at org.apache.derby.impl.jdbc.SQLExceptionFactory.getSQLException(Unknown Source)
    at org.apache.derby.impl.jdbc.Util.generateCsSQLException(Unknown Source)
    at org.apache.derby.impl.jdbc.EmbedConnection.bootDatabase(Unknown Source)
    at org.apache.derby.impl.jdbc.EmbedConnection.<init>(Unknown Source)
    at org.apache.derby.jdbc.InternalDriver.getNewEmbedConnection(Unknown Source)
    at org.apache.derby.jdbc.InternalDriver.connect(Unknown Source)
    at org.apache.derby.jdbc.InternalDriver.connect(Unknown Source)
    at org.apache.derby.jdbc.EmbeddedDriver.connect(Unknown Source)
    at org.apache.derby.impl.drda.Database.makeConnection(Unknown Source)
    at org.apache.derby.impl.drda.DRDAConnThread.getConnFromDatabaseName(Unknown Source)
    at org.apache.derby.impl.drda.DRDAConnThread.verifyUserIdPassword(Unknown Source)
    at org.apache.derby.impl.drda.DRDAConnThread.parseSECCHK(Unknown Source)
    at org.apache.derby.impl.drda.DRDAConnThread.parseDRDAConnection(Unknown Source)
    at org.apache.derby.impl.drda.DRDAConnThread.processCommands(Unknown Source)
    at org.apache.derby.impl.drda.DRDAConnThread.run(Unknown Source)
    Caused by: ERROR XSLAM: Cannot verify database format at {1} due to IOException: 
    C:\Users\user\.netbeans-derby\sample
    at org.apache.derby.iapi.error.StandardException.newException(Unknown Source)
    at org.apache.derby.impl.store.raw.log.LogToFile.verifyLogFormat(Unknown Source)
    at org.apache.derby.impl.store.raw.log.LogToFile.getLogFileAtPosition(Unknown Source)
    at org.apache.derby.impl.store.raw.log.LogToFile.getLogFileAtBeginning(Unknown Source)
    at org.apache.derby.impl.store.raw.log.Scan.getNextRecordForward(Unknown Source)
    at org.apache.derby.impl.store.raw.log.Scan.getNextRecord(Unknown Source)
    at org.apache.derby.impl.store.raw.log.FileLogger.redo(Unknown Source)
    at org.apache.derby.impl.store.raw.log.LogToFile.recover(Unknown Source)
    at org.apache.derby.impl.store.raw.RawStore.boot(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.boot(Unknown Source)
    at org.apache.derby.impl.services.monitor.TopService.bootModule(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.startModule(Unknown Source)
    at org.apache.derby.impl.services.monitor.FileMonitor.startModule(Unknown Source)
    at org.apache.derby.iapi.services.monitor.Monitor.bootServiceModule(Unknown Source)
    at org.apache.derby.impl.store.access.RAMAccessManager.boot(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.boot(Unknown Source)
    at org.apache.derby.impl.services.monitor.TopService.bootModule(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.startModule(Unknown Source)
    at org.apache.derby.impl.services.monitor.FileMonitor.startModule(Unknown Source)
    at org.apache.derby.iapi.services.monitor.Monitor.bootServiceModule(Unknown Source)
    at org.apache.derby.impl.db.BasicDatabase.bootStore(Unknown Source)
    at org.apache.derby.impl.db.BasicDatabase.boot(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.boot(Unknown Source)
    at org.apache.derby.impl.services.monitor.TopService.bootModule(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.bootService(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.startProviderService(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.findProviderAndStartService(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.startPersistentService(Unknown Source)
    at org.apache.derby.iapi.services.monitor.Monitor.startPersistentService(Unknown Source)
    ... 13 more
    Caused by: java.io.EOFException
    at java.io.RandomAccessFile.readInt(RandomAccessFile.java:803)
    ... 41 more
    ============= end nested exception, level (1) ===========
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