mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-02 04:22:03 +00:00
130 lines
7.9 KiB
Markdown
130 lines
7.9 KiB
Markdown
# zookeeper_log
|
|
|
|
This table contains information about the parameters of the request to the ZooKeeper server and the response from it.
|
|
|
|
For requests, only columns with request parameters are filled in, and the remaining columns are filled with default values (`0` or `NULL`). When the response arrives, the data from the response is added to the other columns.
|
|
|
|
Columns with request parameters:
|
|
|
|
- `type` ([Enum](../../sql-reference/data-types/enum.md)) — Event type in the ZooKeeper client. Can have one of the following values:
|
|
- `Request` — The request has been sent.
|
|
- `Response` — The response was received.
|
|
- `Finalize` — The connection is lost, no response was received.
|
|
- `event_date` ([Date](../../sql-reference/data-types/date.md)) — The date when the event happened.
|
|
- `event_time` ([DateTime64](../../sql-reference/data-types/datetime64.md)) — The date and time when the event happened.
|
|
- `address` ([IPv6](../../sql-reference/data-types/domains/ipv6.md)) — IP address of ZooKeeper server that was used to make the request.
|
|
- `port` ([UInt16](../../sql-reference/data-types/int-uint.md)) — The port of ZooKeeper server that was used to make the request.
|
|
- `session_id` ([Int64](../../sql-reference/data-types/int-uint.md)) — The session ID that the ZooKeeper server sets for each connection.
|
|
- `xid` ([Int32](../../sql-reference/data-types/int-uint.md)) — The ID of the request within the session. This is usually a sequential request number. It is the same for the request row and the paired `response`/`finalize` row.
|
|
- `has_watch` ([UInt8](../../sql-reference/data-types/int-uint.md)) — The request whether the [watch](https://zookeeper.apache.org/doc/r3.3.3/zookeeperProgrammers.html#ch_zkWatches) has been set.
|
|
- `op_num` ([Enum](../../sql-reference/data-types/enum.md)) — The type of request or response.
|
|
- `path` ([String](../../sql-reference/data-types/string.md)) — The path to the ZooKeeper node specified in the request, or an empty string if the request not requires specifying a path.
|
|
- `data` ([String](../../sql-reference/data-types/string.md)) — The data written to the ZooKeeper node (for the `SET` and `CREATE` requests — what the request wanted to write, for the response to the `GET` request — what was read) or an empty string.
|
|
- `is_ephemeral` ([UInt8](../../sql-reference/data-types/int-uint.md)) — Is the ZooKeeper node being created as an [ephemeral](https://zookeeper.apache.org/doc/r3.3.3/zookeeperProgrammers.html#Ephemeral+Nodes).
|
|
- `is_sequential` ([UInt8](../../sql-reference/data-types/int-uint.md)) — Is the ZooKeeper node being created as an [sequential](https://zookeeper.apache.org/doc/r3.3.3/zookeeperProgrammers.html#Sequence+Nodes+--+Unique+Naming).
|
|
- `version` ([Nullable(Int32)](../../sql-reference/data-types/nullable.md)) — The version of the ZooKeeper node that the request expects when executing. This is supported for `CHECK`, `SET`, `REMOVE` requests (is relevant `-1` if the request does not check the version or `NULL` for other requests that do not support version checking).
|
|
- `requests_size` ([UInt32](../../sql-reference/data-types/int-uint.md)) — The number of requests included in the multi request (this is a special request that consists of several consecutive ordinary requests and executes them atomically). All requests included in multi request will have the same `xid`.
|
|
- `request_idx` ([UInt32](../../sql-reference/data-types/int-uint.md)) — The number of the request included in multi request (for multi request — `0`, then in order from `1`).
|
|
|
|
Columns with request response parameters:
|
|
|
|
- `zxid` ([Int64](../../sql-reference/data-types/int-uint.md)) — ZooKeeper transaction ID. The serial number issued by the ZooKeeper server in response to a successfully executed request (`0` if the request was not executed/returned an error/the client does not know whether the request was executed).
|
|
- `error` ([Nullable(Enum)](../../sql-reference/data-types/nullable.md)) — Error code. Can have many values, here are just some of them:
|
|
- `ZOK` — The request was executed seccessfully.
|
|
- `ZCONNECTIONLOSS` — The connection was lost.
|
|
- `ZOPERATIONTIMEOUT` — The request execution timeout has expired.
|
|
- `ZSESSIONEXPIRED` — The session has expired.
|
|
- `NULL` — The request is completed.
|
|
- `watch_type` ([Nullable(Enum)](../../sql-reference/data-types/nullable.md)) — The type of the `watch` event (for responses with `op_num` = `Watch`), for the remaining responses: `NULL`.
|
|
- `watch_state` ([Nullable(Enum)](../../sql-reference/data-types/nullable.md)) — The status of the `watch` event (for responses with `op_num` = `Watch`), for the remaining responses: `NULL`.
|
|
- `path_created` ([String](../../sql-reference/data-types/string.md)) — The path to the created ZooKeeper node (for responses to the `CREATE` request), may differ from the `path` if the node is created as a `sequential`.
|
|
- `stat_czxid` ([Int64](../../sql-reference/data-types/int-uint.md)) — The `zxid` of the change that caused this ZooKeeper node to be created.
|
|
- `stat_mzxid` ([Int64](../../sql-reference/data-types/int-uint.md)) — The `zxid` of the change that last modified this ZooKeeper node.
|
|
- `stat_pzxid` ([Int64](../../sql-reference/data-types/int-uint.md)) — The transaction ID of the change that last modified childern of this ZooKeeper node.
|
|
- `stat_version` ([Int32](../../sql-reference/data-types/int-uint.md)) — The number of changes to the data of this ZooKeeper node.
|
|
- `stat_cversion` ([Int32](../../sql-reference/data-types/int-uint.md)) — The number of changes to the children of this ZooKeeper node.
|
|
- `stat_dataLength` ([Int32](../../sql-reference/data-types/int-uint.md)) — The length of the data field of this ZooKeeper node.
|
|
- `stat_numChildren` ([Int32](../../sql-reference/data-types/int-uint.md)) — The number of children of this ZooKeeper node.
|
|
- `children` ([Array(String)](../../sql-reference/data-types/array.md)) — The list of child ZooKeeper nodes (for responses to `LIST` request).
|
|
|
|
**Example**
|
|
|
|
Query:
|
|
|
|
``` sql
|
|
SELECT * FROM system.zookeeper_log WHERE (session_id = '106662742089334927') AND (xid = '10858') FORMAT Vertical;
|
|
```
|
|
|
|
Result:
|
|
|
|
``` text
|
|
Row 1:
|
|
──────
|
|
type: Request
|
|
event_date: 2021-08-09
|
|
event_time: 2021-08-09 21:38:30.291792
|
|
address: ::
|
|
port: 2181
|
|
session_id: 106662742089334927
|
|
xid: 10858
|
|
has_watch: 1
|
|
op_num: List
|
|
path: /clickhouse/task_queue/ddl
|
|
data:
|
|
is_ephemeral: 0
|
|
is_sequential: 0
|
|
version: ᴺᵁᴸᴸ
|
|
requests_size: 0
|
|
request_idx: 0
|
|
zxid: 0
|
|
error: ᴺᵁᴸᴸ
|
|
watch_type: ᴺᵁᴸᴸ
|
|
watch_state: ᴺᵁᴸᴸ
|
|
path_created:
|
|
stat_czxid: 0
|
|
stat_mzxid: 0
|
|
stat_pzxid: 0
|
|
stat_version: 0
|
|
stat_cversion: 0
|
|
stat_dataLength: 0
|
|
stat_numChildren: 0
|
|
children: []
|
|
|
|
Row 2:
|
|
──────
|
|
type: Response
|
|
event_date: 2021-08-09
|
|
event_time: 2021-08-09 21:38:30.292086
|
|
address: ::
|
|
port: 2181
|
|
session_id: 106662742089334927
|
|
xid: 10858
|
|
has_watch: 1
|
|
op_num: List
|
|
path: /clickhouse/task_queue/ddl
|
|
data:
|
|
is_ephemeral: 0
|
|
is_sequential: 0
|
|
version: ᴺᵁᴸᴸ
|
|
requests_size: 0
|
|
request_idx: 0
|
|
zxid: 16926267
|
|
error: ZOK
|
|
watch_type: ᴺᵁᴸᴸ
|
|
watch_state: ᴺᵁᴸᴸ
|
|
path_created:
|
|
stat_czxid: 16925469
|
|
stat_mzxid: 16925469
|
|
stat_pzxid: 16926179
|
|
stat_version: 0
|
|
stat_cversion: 7
|
|
stat_dataLength: 0
|
|
stat_numChildren: 7
|
|
children: ['query-0000000006','query-0000000005','query-0000000004','query-0000000003','query-0000000002','query-0000000001','query-0000000000']
|
|
```
|
|
|
|
**See Also**
|
|
|
|
- [ZooKeeper](../../operations/tips.md#zookeeper)
|
|
- [ZooKeeper guide](https://zookeeper.apache.org/doc/r3.3.3/zookeeperProgrammers.html)
|