在shell 中执行下面的命令,将队列中异常任务的 path 输出到 clickhouse_exception.log 文件中; clickhouse-client --query "SELECT replica_path || '/queue/' || node_name FROM system.replication_queue JOIN system.replicas USING (database, table) WHERE create_time < now() - INTERVAL 1 DAY AND typ...
replication_queue Contains information about tasks from replication queues stored in ClickHouse Keeper, or ZooKeeper, for tables in theReplicatedMergeTreefamily. Columns: database(String) — Name of the database. table(String) — Name of the table....
ReplicatedMergeTreeBlockOutputStream::writewriteTempPart//数据写入本地磁盘commitPart//向zk提交插入的part信息renameTempPartAndAdd//临时目录变为正式目录makeCreateRequest//提交log_entry,zk上会创建log-xxxmergeSelectingTask//主动触发merge任务# 队列更新线程 queueUpdatingTask,也就是log entry的监控线程 ReplicatedM...
2. 任务类 2.1. system.replication_queue 如果你使用的是ReplicatedMergeTree引擎,那么这张表你大概率会用到,它的数据来源于zookeeper上每张表下面的replication queues节点。根据clickhouse副本同步的原理,当你有数据分片需要同步到副本时,不是直接和副本通信,而是把要同步的信息作为一个任务提交到replication queues这个队...
replication_queue:包含有关存储在 ClickHouse Keeper 或 ZooKeeper 中的复制队列中的任务信息,用于ReplicatedMergeTree引擎表 role_grants:包含用户和角色的角色授权。要向此表添加条目,请使用GRANT role TO user roles:包含有关已配置角色的信息 row_policies:包含行策略信息,以及使用该行策略的角色和/或用户列表 sessio...
查询集群中每个节点的 system.replication_queue,存在异常 MERGE_PARTS 类型任务,日志中有 "No active replica has part ... or covering part" 报错信息。 处理办法 问题出现的原因为 Clickhouse V20 有相关 Bug。当一些副本中有 Parts 丢失,此时副本同步队列中有异常任务时则会导致副本之前的同步出现死锁现象,具...
查询集群中每个节点的 system.replication_queue,存在异常 MERGE_PARTS 类型任务,日志中有 "No active replica has part ... or covering part" 报错信息。 处理办法 问题出现的原因为 Clickhouse V20 有相关 Bug。当一些副本中有 Parts 丢失,此时副本同步队列中有异常任务时则会导致副本之前的同步出现死锁现象,具...
Situation: One replica out of 3 was working slower than usual (due to the extra load) and was not able to sort out the replication queue at the usual speed. The other 2 replicas were working as normal, accepting inserts and doing merges...
selecthostName()ashostName,count(*)asnumfromclusterAllReplicas('default','system.replication_queue')wheretype='GET_PART'and is_currently_executing=0order by hostName 节点后台等待执行的fetch 任务详细信息,根据等待时间倒序排序 selecthostName()ashostName,toUnixTimestamp(now())-toUnixTimestamp(create...
clickhouse-client --query "SELECT replica_path || '/queue/' || node_name FROM system.replication_queue JOIN system.replicas USING (database, table) WHERE create_time < now() AND last_exception LIKE '%No active replica has part%'" | while read i; dozkCli.sh--host ... -n delete ...