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Posted to notifications@iotdb.apache.org by "yanze chen (Jira)" <ji...@apache.org> on 2022/11/16 08:02:00 UTC

[jira] [Commented] (IOTDB-4960) [SchemaFile] Query large amounts of metadata throw ClosedChannelException

    [ https://issues.apache.org/jira/browse/IOTDB-4960?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17634708#comment-17634708 ] 

yanze chen commented on IOTDB-4960:
-----------------------------------

原因可能是mpp框架查询超时，interrupt掉了正在read的channel，导致channel关闭

!image-2022-11-16-16-01-50-022.png|width=827,height=407!

> [SchemaFile] Query large amounts of metadata throw ClosedChannelException
> -------------------------------------------------------------------------
>
>                 Key: IOTDB-4960
>                 URL: https://issues.apache.org/jira/browse/IOTDB-4960
>             Project: Apache IoTDB
>          Issue Type: Bug
>            Reporter: yanze chen
>            Assignee: yanze chen
>            Priority: Major
>         Attachments: image-2022-11-16-15-29-18-436.png, image-2022-11-16-16-01-50-022.png
>
>
> reproduce:
> 1C1D Schema_File mode 128G for DataNode
>  
> run benchmark with config: 
> {*}DEVICE_NUMBER{*}=5000
> {*}SENSOR_NUMBER{*}=20000
> {*}CLIENT_NUMBER{*}=5
> {*}GROUP_NUMBER{*}=10
> {*}BATCH_SIZE_PER_WRITE{*}=0
> {*}LOOP{*}=1
> {*}VECTOR{*}=true
>  
> execute SQL:
> count timeseries root.**
>  
> !image-2022-11-16-15-29-18-436.png|width=881,height=596!
>  
>  
>  
>  



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