show-events v5.6
Shows events such as background worker errors and node membership changes.
Synopsis
Shows events such as background worker errors and node membership changes.
Output is sorted by Time column in descending order. Message column is
truncated after a few lines. To view complete message use json output format
(-o json).
For more details on each node state, see show-nodes command help
(pgd show-nodes -h).
pgd show-events [flags]
Node States
| State | Description |
|---|---|
| NONE | Node state is unset when the worker starts, expected to be set quickly to the current known state. |
| CREATED | bdr.create_node() has been executed, but the node isn't a member of any EDB Postgres Distributed cluster yet. |
| JOIN_START | bdr.join_node_group() begins to join the local node to an existing EDB Postgres Distributed cluster. |
| JOINING | The node join has started and is currently at the initial sync phase, creating the schema and data on the node. |
| CATCHUP | Initial sync phase is complete; now the join is at the last step of retrieving and applying transactions that were performed on the upstream peer node since the join started. |
| STANDBY | Node join has finished, but not yet started to broadcast changes. All joins spend some time in this state, but if defined as a Logical Standby, the node will continue in this state. |
| PROMOTE | Node was a logical standby and we just called bdr.promote_node to move the node state to ACTIVE. These two PROMOTE states have to be coherent to the fact, that only one node can be with a state higher than STANDBY but lower than ACTIVE. |
| PROMOTING | Promotion from logical standby to full BDR node is in progress. |
| ACTIVE | The node is a full BDR node and is currently ACTIVE. This is the most common node status. |
| PART_START | Node was ACTIVE or STANDBY and we just called bdr.part_node to remove the node from the EDB Postgres Distributed cluster. |
| PARTING | Node disconnects from other nodes and plays no further part in consensus or replication. |
| PART_CATCHUP | Non-parting nodes synchronize any missing data from the recently parted node. |
| PARTED | Node parting operation is now complete on all nodes. |
Only one node at a time can be in either of the states PROMOTE or PROMOTING. STANDBY indicates that the node is in a read-only state.
Options
| Flag | Description |
|---|---|
-n, --lines | show top n lines |
See global options for global options.
Examples
Showing top 10 events
In this example, we show top 10 events on a three node cluster.
$ pgd show-events --lines 10
Output
Time Observer Node Subject Node Source Type Subtype Message ---- ------------- ------------ ------ ---- ------- ------- 2023-03-23 05:38:25.243257+00 witness-a1 witness-a1 consensus RAFT STATE_CHANGE RAFT_LEADER 2023-03-23 05:38:25.23815+00 witness-a1 witness-a1 consensus RAFT STATE_CHANGE RAFT_CANDIDATE 2023-03-23 05:38:21.197974+00 bdr-a1 bdr-a1 consensus RAFT STATE_CHANGE RAFT_FOLLOWER 2023-03-23 05:38:21.197107+00 witness-a1 witness-a1 consensus RAFT STATE_CHANGE RAFT_FOLLOWER 2023-03-23 05:38:21.169781+00 bdr-a2 bdr-a2 consensus RAFT STATE_CHANGE RAFT_FOLLOWER 2023-03-23 05:38:17.949669+00 witness-a1 bdr-a1 consensus NODE STATE_CHANGE ACTIVE 2023-03-23 05:38:17.949544+00 bdr-a1 bdr-a1 consensus NODE STATE_CHANGE ACTIVE 2023-03-23 05:38:17.946857+00 bdr-a2 bdr-a1 consensus NODE STATE_CHANGE ACTIVE 2023-03-23 05:38:17.91628+00 bdr-a1 bdr-a2 receiver WORKER ERROR pglogical worker received fast finish request, exiting 2023-03-23 05:38:17.915236+00 witness-a1 bdr-a1 consensus NODE STATE_CHANGE PROMOTING