Sometimes I find that the tablet scheduler can not schedule tablet, and with no more info for debugging.
So I add some debug log for this process.
No logic is changed.
In a scenario where multiple DBs are simultaneously imported with high concurrency, a significant number of transactions will be generated. Without a summary field, we cannot clearly see how many transactions there are in the current cluster. Therefore, I have enhanced this point.
```
mysql> show proc "/transactions";
+-------+-----------------------------------+-----------------------+
| DbId | DbName | RunningTransactionNum |
+-------+-----------------------------------+-----------------------+
| 10002 | default_cluster:xxxx | 0 |
| 14005 | default_cluster:__internal_schema | 0 |
| Total | 2 | 0 |
+-------+-----------------------------------+-----------------------+
3 rows in set (0.02 sec)
```
When doing serialization of minidump input, we can find that when serializing colocate table index, the size and entry get by the hash map always unmatched when concurrent occur. So a write lock be added to ensure concurrency.
Expect vm overcommit memory value to be 1, system will no longer throw bad_alloc, memory alloc are always accepted,
memory limit check is handed over to Doris Allocator, make sure throw exception position is controllable,
otherwise bad_alloc can be thrown anywhere and it will be difficult to achieve exception safety.
When we try to query array of datetimev2 column by inverted index, it returns an error like this:
CREATE TABLE `nested` (
`qid` bigint(20) NULL,
`tag` array<text> NULL,
`creationDate` datetime NULL,
`title` text NULL,
`user` text NULL,
`answers.user` array<text> NULL,
`answers.date` array<datetimev2(0)> NULL,
INDEX tag_idx (`tag`) USING INVERTED PROPERTIES("parser" = "english") COMMENT '',
INDEX creation_date_idx (`creationDate`) USING INVERTED COMMENT '',
INDEX title_idx (`title`) USING INVERTED COMMENT '',
INDEX user_idx (`user`) USING INVERTED COMMENT '',
INDEX answers_user_idx (`answers.user`) USING INVERTED COMMENT '',
INDEX answers_date_idx (`answers.date`) USING INVERTED COMMENT ''
) ENGINE=OLAP
DUPLICATE KEY(`qid`)
COMMENT 'OLAP'
DISTRIBUTED BY HASH(`qid`) BUCKETS 18
PROPERTIES (
"replication_allocation" = "tag.location.default: 1",
"storage_format" = "V2",
"compression" = "ZSTD",
"light_schema_change" = "true",
"dynamic_schema" = "true",
"disable_auto_compaction" = "false"
);
mysql> select * from nested.nested where tag match 'java' and `answers.date` element_le '2012-04-08T21:15:33.873Z' limit 10;
ERROR 1105 (HY000): errCode = 2, detailMessage = no function found for MATCH_ELEMENT_LE,`answers.date` MA
1. add session variable max_execution_time to an alias of query timeout, if user set max_execution_time, the query timeout will be modified too.
2. add a setter attribute to session variable, so that we could add some logic in setter method instead of field reflection.
Add a new FE config: show_details_for_unaccessible_tablet.
Default is false, when set to true, if a query is unable to select a healthy replica,
the detailed information of all the replicas of the tablet including the specific reason why they are unqueryable,
will be printed out.
