If the documentation from the media manager does not provide the needed information, contact technical support for the media manager. Identifies currently active sessions. RMAN displays the error passed back to it by the media manager. If the database server is not linked with the media management library or cannot load it dynamically when needed, then RMAN backups to the media manager fail, but sbttest may still work. This log does not contain Oracle Database or RMAN errors. ORA-27211: Failed to load Media Management Library, "Configuring RMAN to Make Backups to a Media Manager", Oracle Database Backup and Recovery Reference, "Terminating an RMAN Session: Basic Steps", "RMAN DUPLICATE DATABASE at a Past Point in Time: Example". If sbttest returns a nonzero value, then either the media manager is not installed or it is not configured correctly. The alert subdirectory of the Automatic Diagnostic Repository (ADR) home. In UNIX, an RMAN session has the following processes associated with it: The default channel, the initial connection to the target database, One target connection to the target database corresponding to each allocated channel, The catalog connection to the recovery catalog database, if you use a recovery catalog, An auxiliary connection to an auxiliary instance, during DUPLICATE or TSPITR operations. If either the target connection or any of the auxiliary connections are executing in the media management layer, then they do not terminate until the processes are manually terminated at the operating system level. You transfer the control file copy to machine 2. The trace file should have the complete path name of the media management library loaded by the database as well as any other media manager errors or operating system errors. Because the control file was not created with RMAN and was not cataloged as a control file copy, RMAN sees the database on machine 2 as the database on machine 1. The second error indicates that the database cannot recover the data file because it is in use or already being recovered. Thus, if the restored backup cannot be made consistent without applying the online redo logs, then duplication fails with RMAN-06023 errors because RMAN is looking for backups created before the most recent archived log. The RMAN-6089 error occurs because RMAN attempts to back up a log that the repository indicates still exists. This also terminates allocated channels, unless they are suspended in the media management code, as happens when, for example, they are waiting for a tape to be mounted. A second way is to search the RMAN output for the string RMAN-00569, which is the message number for the error stack banner. For example, enter: Take new backups so that you can recover the database if necessary. The UNKNOWN name entry is expected behavior after a RESETLOGS operation. You may have more than one library in the operating system path, and the database is loading the wrong one. From a command prompt, run the following command, where sid identifies the database instance to target, and the thread_id is the SPID value from the query in Step 1: Check that the media manager also clears its processes. Sometimes RMAN checks V$SESSION before the RPC has indicated it has started, which in turn generates the following message: If a message stating "RPC call ok" does not appear in the output immediately following the message stating "RPC call appears to have failed", then the backup job encountered an internal problem. Example 23-1 shows a syntax error. For example, run the following query on the target instance: Examine the SQL output to determine which sbt functions are waiting. This chapter contains the following topics: Recovery Manager provides detailed error messages that can aid in troubleshooting problems. One way to determine whether RMAN encountered an error is to examine its return code or exit status. In this scenario, you list the database incarnations registered in the recovery catalog and see a database with the name UNKNOWN: One way you get the DB_NAME of UNKNOWN is when you register a database that was once opened with the RESETLOGS option. This chapter describes how to troubleshoot Recovery Manager. In the error codes, O/S stands for operating system. There are several ways to terminate an RMAN command in the middle of execution: The preferred method is to press Control+C (or the equivalent "attention" key combination for your system) in the RMAN interface. If the program encounters an error, then it provides messages describing the failure. On machine 2, you create a new initialization parameter file and new database instance. To terminate an Oracle Database process that is not responding in the media manager: Query V$SESSION and V$SESSION_WAIT as described in "Using V$ Views for RMAN Troubleshooting". For example, the output may be as follows: Using operating system-level tools appropriate to your platform, end the unresponsive sessions. Any failures from Delphix Engine backups in v$rman_* views can be safely ignored. If target and auxiliary connections are suspended but not while executing media manager code, they also terminate. For example, run the following statement, where sid_in_rman_output is the number from the RMAN message: Then, run the following statement, substituting the sid_in_rman_output and serial number obtained from the query: This statement has no effect on the session if the session stopped in media manager code. Terminating the catalog connection does not cause the RMAN process to terminate because RMAN is not performing catalog operations while the backup or restore is in progress. You do not use CATALOG to add this control file copy to the repository. The main information of interest returned by SBT 1.1 media managers is the error code in the "Additional information" line: Referring to Table 23-3, you discover that error 7005 means that the media management device is busy. Consult your media manager documentation for details. Assume that you attempt to recover a tablespace and receive the following errors: As suggested, you start reading from the bottom up. When running RMAN from the command line, you can direct output to the following places: A log file specified by LOG on the command line or the SPOOL LOG command, A file created by redirecting RMAN output (for example, in UNIX, using the'>' operator). The database just passes the message on from the media manager. For example, if your library is called /vendor/lib/some_mm_lib.so, then run a command such as the following, making sure to specify whatever PARMS settings are required by your media manager: If the channel allocation fails, then check the trace file again to see whether you can learn anything new. If the sbt wait event query is unhelpful, then examine media manager process, log, and trace files for signs of abnormal termination or other errors (refer to the description of message files in "Identifying Types of Message Output"). For the majority of customers this change will be completely transparent, however if customers are monitoring v$rman_output to check for RMAN backup failures they will now see the archive log backups from Delphix as being failed. In this scenario, an RMAN backup job starts as normal and then pauses inexplicably: If a backup job is hanging, that is, not proceeding, then several scenarios are possible: A server-side or media management error occurred. You restore and recover database the new database on machine 2 and then open it. Note, however, that writing SBT trace messages is the responsibility of the media management software, not the Oracle database or RMAN. You may find more detailed information in the file sbtio.log, as described in the error message. If more than one RMAN session is active, then it is possible for the V$SESSION.CLIENT_INFO column to yield the same information for a channel in each session. In this scenario, you attempt to duplicate a database with the DUPLICATE command, but receive the following error stack: The problem is that RMAN is not able to apply all the archived logs needed for complete recovery. Also, Oracle Database and the third-party media vendors generate useful debugging output of their own. For example: In this case, you have the following methods for determining which channel corresponds to which SID value. For example, the output may be as follows: Because the causes of a hung backup job can be varied, so are the solutions. Not all media managers can detect the termination of the Oracle Database process. Note the following tips and suggestions: Read the messages from the bottom up, because this is the order in which RMAN issues the messages. You can identify the Oracle session ID for an RMAN channel by looking in the RMAN log for messages with the format shown in the following example: The sid and devtype are displayed for each allocated channel. The ORA-01110 message explains there was a problem with the recovery of data file users01.dbf. If you accidentally confuse the logs during a media recovery, then the database will be corrupted but Oracle and RMAN cannot detect the problem. Connect to the target database with SQL*Plus. Check the following: Make sure the archived log file that is specified by the RMAN-6089 error exists in the correct directory. The output of these views will show the following, Note that even if "normal LogSync exit" is displayed, this does not mean the backup was successful, further errors may have occurred, such as. You receive the following error stack: The DUPLICATE command recovers to archived redo logs, but cannot recover into online redo logs. Typically, there is no need to refer to the trace file or sbtio.log in such a case. If one RMAN job is already backing up the control file while another needs to create a new snapshot control file, then you may see the following message: Under normal circumstances, a job that must wait for the control file enqueue waits for a brief interval and then successfully obtains the enqueue. Sometimes it is useful to identify exactly what a server session performing a backup and recovery job is doing. For example, if you run UNIX with the C shell, then, when RMAN completes, the return code is placed in a shell variable called $status. This utility performs a simple test of the media management software by acting as the Oracle database server and attempting to communicate with the media manager. See your operating system-specific documentation for more information. The database does not recognize the control file as a backup control file: to the database it looks like the current control file. Normal action descriptions do not have a prefix. If you are still using an SBT 1.1-compliant media management layer, you may see some additional error message text. For example, if the database cannot find the library, you see: In some cases, sbttest can work but an RMAN backup does not. When you are using an SBT 1.1 media management layer and you are presented with SBT 1.1 style error messages containing the "Additional information:" numeric error codes, look for the ORA-19511 message that follows for the text of error messages passed back to RMAN by the media manager. As soon as the Delphix Engine finished the archive log backup it would issue a delete for the backup we just took, however this would leave a small window of time where Oracle would see the archive log backup as valid and available for restoration. Compilation of RESTORE or RECOVER command, Interphase errors between PL/SQL and RMAN. For example, one log may have been created on the original host and the other on the new host. (Terminating the Oracle processes may cause problems with the media manager. The SBT 1.1 error messages are listed here for your reference. However, if the SECONDS_IN_WAIT column is high, then the media manager may be suspended. On machine 1, you start RMAN and connect to the original target database and recovery catalog. You should not attempt to remove UNKNOWN entries from the recovery catalog. The file names for any media manager logs other than sbtio.log are determined by the media management software. When only one RMAN session is active, the easiest method for determining the server session ID for an RMAN channel is to execute the following query on the target database while the RMAN job is executing: If you set an ID using the RMAN SET COMMAND ID command instead of using the system-generated default ID, then search for that value in the CLIENT_INFO column instead of 'rman%'. The reason for canceling is that the USING BACKUP CONTROLFILE clause stamps the control file as a backup, which then permits OPEN RESETLOGS. To correlate a process with a channel during a backup: In an active session, run the RMAN job as usual and examine the output to get the sid for the channel. The Oracle Database sid is different from the operating system process ID. Table 23-3 lists media manager message numbers and their corresponding error text. On platforms such as Solaris, you do not have to relink when using sbttest. How you access this return code depends upon the environment from which you invoked the RMAN client. On some platforms, the server sessions are not associated with any processes at all. This solution is safest and is strongly recommended. Records values for overwritten control file records. For example, on UNIX the SPID column shows the process ID, whereas on Windows the SPID column shows the thread ID. On some platforms, Oracle provides a diagnostic tool called sbttest. Contact Oracle Support for further assistance. For example, enter: This solution is similar to the previous one, but does require that you re-create your control file. You can end the session using a SQL ALTER SYSTEM KILL SESSION statement. It indicates the basic problem, that the media management library could not be loaded. RMAN usually stops responding because a channel connection is waiting in the media manager code for a tape resource. To force RMAN to delete all existing archived redo logs, use the DELETE ALL INPUT clause of the BACKUP command. If the error is "sbtclose2 returned error - failed to close file" - and there are no other errors - the system is working as intended. You may sometimes need to terminate an RMAN job that is not responding in the media manager. Typically, you find the following types of error codes in RMAN message stacks: Errors preceded by the line Additional information: Table 23-2 indicates the error ranges for common RMAN error messages, all of which are described in Oracle Database Error Messages. Ideally, the query of the sbt wait events should indicate the problem. The cause can be addressed only by the media management vendor. The recovery catalog indicates that the highest RECID is 100, but the control file indicates that the highest RECID is 90.
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