22.5.7.1 NDB Cluster: Messages in the Cluster Log

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The following table lists the most common NDB cluster log messages. For information about the cluster log, log events, and event types, see Section 22.5.6, “Event Reports Generated in NDB Cluster”. These log messages also correspond to log event types in the MGM API; see The Ndb_logevent_type Type, for related information of interest to Cluster API developers.

Table 22.373 Common NDB cluster log messages

Log Message	Description	Event Name	Event Type	Priority	Severity
`Node mgm_node_id: Node data_node_id Connected`	The data node having node ID `node_id` has connected to the management server (node `mgm_node_id`).	`Connected`	`Connection`	8	`INFO`
`Node mgm_node_id: Node data_node_id Disconnected`	The data node having node ID `data_node_id` has disconnected from the management server (node `mgm_node_id`).	`Disconnected`	`Connection`	8	`ALERT`
`Node data_node_id: Communication to Node api_node_id closed`	The API node or SQL node having node ID `api_node_id` is no longer communicating with data node `data_node_id`.	`CommunicationClosed`	`Connection`	8	`INFO`
`Node data_node_id: Communication to Node api_node_id opened`	The API node or SQL node having node ID `api_node_id` is now communicating with data node `data_node_id`.	`CommunicationOpened`	`Connection`	8	`INFO`
`Node mgm_node_id: Node api_node_id: API version`	The API node having node ID `api_node_id` has connected to management node `mgm_node_id` using `NDB` API version `version` (generally the same as the MySQL version number).	`ConnectedApiVersion`	`Connection`	8	`INFO`
`Node node_id: Global checkpoint gci started`	A global checkpoint with the ID `gci` has been started; node `node_id` is the master responsible for this global checkpoint.	`GlobalCheckpointStarted`	`Checkpoint`	9	`INFO`
`Node node_id: Global checkpoint gci completed`	The global checkpoint having the ID `gci` has been completed; node `node_id` was the master responsible for this global checkpoint.	`GlobalCheckpointCompleted`	`Checkpoint`	10	`INFO`
`Node node_id: Local checkpoint lcp started. Keep GCI = current_gci oldest restorable GCI = old_gci`	The local checkpoint having sequence ID `lcp` has been started on node `node_id`. The most recent GCI that can be used has the index `current_gci`, and the oldest GCI from which the cluster can be restored has the index `old_gci`.	`LocalCheckpointStarted`	`Checkpoint`	7	`INFO`
`Node node_id: Local checkpoint lcp completed`	The local checkpoint having sequence ID `lcp` on node `node_id` has been completed.	`LocalCheckpointCompleted`	`Checkpoint`	8	`INFO`
`Node node_id: Local Checkpoint stopped in CALCULATED_KEEP_GCI`	The node was unable to determine the most recent usable GCI.	`LCPStoppedInCalcKeepGci`	`Checkpoint`	0	`ALERT`
`Node node_id: Table ID = table_id, fragment ID = fragment_id has completed LCP on Node node_id maxGciStarted: started_gci maxGciCompleted: completed_gci`	A table fragment has been checkpointed to disk on node `node_id`. The GCI in progress has the index `started_gci`, and the most recent GCI to have been completed has the index `completed_gci`.	`LCPFragmentCompleted`	`Checkpoint`	11	`INFO`
`Node node_id: ACC Blocked num_1 and TUP Blocked num_2 times last second`	Undo logging is blocked because the log buffer is close to overflowing.	`UndoLogBlocked`	`Checkpoint`	7	`INFO`
`Node node_id: Start initiated version`	Data node `node_id`, running `NDB` version `version`, is beginning its startup process.	`NDBStartStarted`	`StartUp`	1	`INFO`
`Node node_id: Started version`	Data node `node_id`, running `NDB` version `version`, has started successfully.	`NDBStartCompleted`	`StartUp`	1	`INFO`
`Node node_id: STTORRY received after restart finished`	The node has received a signal indicating that a cluster restart has completed.	`STTORRYRecieved`	`StartUp`	15	`INFO`
`Node node_id: Start phase phase completed (type)`	The node has completed start phase `phase` of a `type` start. For a listing of start phases, see Section 22.5.1, “Summary of NDB Cluster Start Phases”. (`type` is one of `initial`, `system`, `node`, `initial node`, or `<Unknown>`.)	`StartPhaseCompleted`	`StartUp`	4	`INFO`
`Node node_id: CM_REGCONF president = president_id, own Node = own_id, our dynamic id = dynamic_id`	Node `president_id` has been selected as “president”. `own_id` and `dynamic_id` should always be the same as the ID (`node_id`) of the reporting node.	`CM_REGCONF`	`StartUp`	3	`INFO`
`Node node_id: CM_REGREF from Node president_id to our Node node_id. Cause = cause`	The reporting node (ID `node_id`) was unable to accept node `president_id` as president. The `cause` of the problem is given as one of `Busy`, `Election with wait = false`, `Not president`, `Election without selecting new candidate`, or `No such cause`.	`CM_REGREF`	`StartUp`	8	`INFO`
`Node node_id: We are Node own_id with dynamic ID dynamic_id, our left neighbor is Node id_1, our right is Node id_2`	The node has discovered its neighboring nodes in the cluster (node `id_1` and node `id_2`). `node_id`, `own_id`, and `dynamic_id` should always be the same; if they are not, this indicates a serious misconfiguration of the cluster nodes.	`FIND_NEIGHBOURS`	`StartUp`	8	`INFO`
`Node node_id: type shutdown initiated`	The node has received a shutdown signal. The `type` of shutdown is either `Cluster` or `Node`.	`NDBStopStarted`	`StartUp`	1	`INFO`
`Node node_id: Node shutdown completed`[`, action`] [`Initiated by signal signal.`]	The node has been shut down. This report may include an `action`, which if present is one of `restarting`, `no start`, or `initial`. The report may also include a reference to an `NDB` Protocol `signal`; for possible signals, refer to Operations and Signals.	`NDBStopCompleted`	`StartUp`	1	`INFO`
`Node node_id: Forced node shutdown completed`[`, action`]`.` [`Occurred during startphase start_phase.`] [`Initiated by signal.`] [`Caused by error error_code: 'error_message(error_classification). error_status'.` [`(extra info extra_code)`]]	The node has been forcibly shut down. The `action` (one of `restarting`, `no start`, or `initial`) subsequently being taken, if any, is also reported. If the shutdown occurred while the node was starting, the report includes the `start_phase` during which the node failed. If this was a result of a `signal` sent to the node, this information is also provided (see Operations and Signals, for more information). If the error causing the failure is known, this is also included; for more information about `NDB` error messages and classifications, see NDB Cluster API Errors.	`NDBStopForced`	`StartUp`	1	`ALERT`
`Node node_id: Node shutdown aborted`	The node shutdown process was aborted by the user.	`NDBStopAborted`	`StartUp`	1	`INFO`
`Node node_id: StartLog: [GCI Keep: keep_pos LastCompleted: last_pos NewestRestorable: restore_pos]`	This reports global checkpoints referenced during a node start. The redo log prior to `keep_pos` is dropped. `last_pos` is the last global checkpoint in which data node the participated; `restore_pos` is the global checkpoint which is actually used to restore all data nodes.	`StartREDOLog`	`StartUp`	4	`INFO`
`startup_message` [Listed separately; see below.]	There are a number of possible startup messages that can be logged under different circumstances. These are listed separately; see Section 22.5.7.2, “NDB Cluster Log Startup Messages”.	`StartReport`	`StartUp`	4	`INFO`
`Node node_id: Node restart completed copy of dictionary information`	Copying of data dictionary information to the restarted node has been completed.	`NR_CopyDict`	`NodeRestart`	8	`INFO`
`Node node_id: Node restart completed copy of distribution information`	Copying of data distribution information to the restarted node has been completed.	`NR_CopyDistr`	`NodeRestart`	8	`INFO`
`Node node_id: Node restart starting to copy the fragments to Node node_id`	Copy of fragments to starting data node `node_id` has begun	`NR_CopyFragsStarted`	`NodeRestart`	8	`INFO`
`Node node_id: Table ID = table_id, fragment ID = fragment_id have been copied to Node node_id`	Fragment `fragment_id` from table `table_id` has been copied to data node `node_id`	`NR_CopyFragDone`	`NodeRestart`	10	`INFO`
`Node node_id: Node restart completed copying the fragments to Node node_id`	Copying of all table fragments to restarting data node `node_id` has been completed	`NR_CopyFragsCompleted`	`NodeRestart`	8	`INFO`
`Node node_id: Node node1_id completed failure of Node node2_id`	Data node `node1_id` has detected the failure of data node `node2_id`	`NodeFailCompleted`	`NodeRestart`	8	`ALERT`
`All nodes completed failure of Node node_id`	All (remaining) data nodes have detected the failure of data node `node_id`	`NodeFailCompleted`	`NodeRestart`	8	`ALERT`
`Node failure of node_idblock completed`	The failure of data node `node_id` has been detected in the `block``NDB` kernel block, where block is 1 of `DBTC`, `DBDICT`, `DBDIH`, or `DBLQH`; for more information, see NDB Kernel Blocks	`NodeFailCompleted`	`NodeRestart`	8	`ALERT`
`Node mgm_node_id: Node data_node_id has failed. The Node state at failure was state_code`	A data node has failed. Its state at the time of failure is described by an arbitration state code `state_code`: possible state code values can be found in the file `include/kernel/signaldata/ArbitSignalData.hpp`.	`NODE_FAILREP`	`NodeRestart`	8	`ALERT`
`President restarts arbitration thread [state=state_code]` or `Prepare arbitrator node node_id [ticket=ticket_id]` or `Receive arbitrator node node_id [ticket=ticket_id]` or `Started arbitrator node node_id [ticket=ticket_id]` or `Lost arbitrator node node_id - process failure [state=state_code]` or `Lost arbitrator node node_id - process exit [state=state_code]` or `Lost arbitrator node node_id - error_message [state=state_code]`	This is a report on the current state and progress of arbitration in the cluster. `node_id` is the node ID of the management node or SQL node selected as the arbitrator. `state_code` is an arbitration state code, as found in `include/kernel/signaldata/ArbitSignalData.hpp`. When an error has occurred, an `error_message`, also defined in `ArbitSignalData.hpp`, is provided. `ticket_id` is a unique identifier handed out by the arbitrator when it is selected to all the nodes that participated in its selection; this is used to ensure that each node requesting arbitration was one of the nodes that took part in the selection process.	`ArbitState`	`NodeRestart`	6	`INFO`
`Arbitration check lost - less than 1/2 nodes left` or `Arbitration check won - all node groups and more than 1/2 nodes left` or `Arbitration check won - node group majority` or `Arbitration check lost - missing node group` or `Network partitioning - arbitration required` or `Arbitration won - positive reply from node node_id` or `Arbitration lost - negative reply from node node_id` or `Network partitioning - no arbitrator available` or `Network partitioning - no arbitrator configured` or `Arbitration failure - error_message [state=state_code]`	This message reports on the result of arbitration. In the event of arbitration failure, an `error_message` and an arbitration `state_code` are provided; definitions for both of these are found in `include/kernel/signaldata/ArbitSignalData.hpp`.	`ArbitResult`	`NodeRestart`	2	`ALERT`
`Node node_id: GCP Take over started`	This node is attempting to assume responsibility for the next global checkpoint (that is, it is becoming the master node)	`GCP_TakeoverStarted`	`NodeRestart`	7	`INFO`
`Node node_id: GCP Take over completed`	This node has become the master, and has assumed responsibility for the next global checkpoint	`GCP_TakeoverCompleted`	`NodeRestart`	7	`INFO`
`Node node_id: LCP Take over started`	This node is attempting to assume responsibility for the next set of local checkpoints (that is, it is becoming the master node)	`LCP_TakeoverStarted`	`NodeRestart`	7	`INFO`
`Node node_id: LCP Take over completed`	This node has become the master, and has assumed responsibility for the next set of local checkpoints	`LCP_TakeoverCompleted`	`NodeRestart`	7	`INFO`
`Node node_id: Trans. Count = transactions, Commit Count = commits, Read Count = reads, Simple Read Count = simple_reads, Write Count = writes, AttrInfo Count = AttrInfo_objects, Concurrent Operations = concurrent_operations, Abort Count = aborts, Scans = scans, Range scans = range_scans`	This report of transaction activity is given approximately once every 10 seconds	`TransReportCounters`	`Statistic`	8	`INFO`
`Node node_id: Operations=operations`	Number of operations performed by this node, provided approximately once every 10 seconds	`OperationReportCounters`	`Statistic`	8	`INFO`
`Node node_id: Table with ID = table_id created`	A table having the table ID shown has been created	`TableCreated`	`Statistic`	7	`INFO`
`Node node_id: Mean loop Counter in doJob last 8192 times = count`		`JobStatistic`	`Statistic`	9	`INFO`
`Mean send size to Node = node_id last 4096 sends = bytes bytes`	This node is sending an average of `bytes` bytes per send to node `node_id`	`SendBytesStatistic`	`Statistic`	9	`INFO`
`Mean receive size to Node = node_id last 4096 sends = bytes bytes`	This node is receiving an average of `bytes` of data each time it receives data from node `node_id`	`ReceiveBytesStatistic`	`Statistic`	9	`INFO`
`Node node_id: Data usage is data_memory_percentage% (data_pages_used 32K pages of total data_pages_total)` / `Node node_id: Index usage is index_memory_percentage% (index_pages_used 8K pages of total index_pages_total)`	This report is generated when a `DUMP 1000` command is issued in the cluster management client	`MemoryUsage`	`Statistic`	5	`INFO`
`Node node1_id: Transporter to node node2_id reported error error_code: error_message`	A transporter error occurred while communicating with node `node2_id`; for a listing of transporter error codes and messages, see NDB Transporter Errors, in MySQL NDB Cluster Internals Manual	`TransporterError`	`Error`	2	`ERROR`
`Node node1_id: Transporter to node node2_id reported error error_code: error_message`	A warning of a potential transporter problem while communicating with node `node2_id`; for a listing of transporter error codes and messages, see NDB Transporter Errors, for more information	`TransporterWarning`	`Error`	8	`WARNING`
`Node node1_id: Node node2_id missed heartbeat heartbeat_id`	This node missed a heartbeat from node `node2_id`	`MissedHeartbeat`	`Error`	8	`WARNING`
`Node node1_id: Node node2_id declared dead due to missed heartbeat`	This node has missed at least 3 heartbeats from node `node2_id`, and so has declared that node “dead”	`DeadDueToHeartbeat`	`Error`	8	`ALERT`
`Node node1_id: Node Sent Heartbeat to node = node2_id`	This node has sent a heartbeat to node `node2_id`	`SentHeartbeat`	`Info`	12	`INFO`
`Node node_id: Event buffer status (object_id): used=bytes_used (percent_used% of alloc) alloc=bytes_allocated max=bytes_available latest_consumed_epoch=latest_consumed_epoch latest_buffered_epoch=latest_buffered_epoch report_reason=report_reason`	This report is seen during heavy event buffer usage, for example, when many updates are being applied in a relatively short period of time; the report shows the number of bytes and the percentage of event buffer memory used, the bytes allocated and percentage still available, and the latest buffered and consumed epochs; for more information, see Section 22.5.7.3, “Event Buffer Reporting in the Cluster Log”	`EventBufferStatus2`	`Info`	7	`INFO`
`Node node_id: Entering single user mode`, `Node node_id: Entered single user mode Node API_node_id has exclusive access`, `Node node_id: Entering single user mode`	These reports are written to the cluster log when entering and exiting single user mode; `API_node_id` is the node ID of the API or SQL having exclusive access to the cluster (for more information, see Section 22.5.8, “NDB Cluster Single User Mode”); the message `Unknown single user report API_node_id` indicates an error has taken place and should never be seen in normal operation	`SingleUser`	`Info`	7	`INFO`
`Node node_id: Backup backup_id started from node mgm_node_id`	A backup has been started using the management node having `mgm_node_id`; this message is also displayed in the cluster management client when the `START BACKUP` command is issued; for more information, see Section 22.5.3.2, “Using The NDB Cluster Management Client to Create a Backup”	`BackupStarted`	`Backup`	7	`INFO`
`Node node_id: Backup backup_id started from node mgm_node_id completed. StartGCP: start_gcp StopGCP: stop_gcp #Records: records #LogRecords: log_records Data: data_bytes bytes Log: log_bytes bytes`	The backup having the ID `backup_id` has been completed; for more information, see Section 22.5.3.2, “Using The NDB Cluster Management Client to Create a Backup”	`BackupCompleted`	`Backup`	7	`INFO`
`Node node_id: Backup request from mgm_node_id failed to start. Error: error_code`	The backup failed to start; for error codes, see MGM API Errors	`BackupFailedToStart`	`Backup`	7	`ALERT`
`Node node_id: Backup backup_id started from mgm_node_id has been aborted. Error: error_code`	The backup was terminated after starting, possibly due to user intervention	`BackupAborted`	`Backup`	7	`ALERT`

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