we are using "Download DataSubset (On-Premise) " plugin in reports fo

we are using "Download DataSubset (On-Premise) " plugin in reports for export to excel option , this works well if we have less amount of data ,however , at times , we get internal 500 error with "ConcurrentModificationException" in logs , any one has any clue on why we get this exception ?

OriginalPostID-189862

OriginalPostID-189862

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  • Hi Rajashekhar,

    This issue might occur if the size of the data is more that 1 MB (This is the default limit for the query rule). OR DB is having corrupted data.
    - You can check if the rule which is returning the data is working fine and returning data correctly (If data is large). If this is memory issue this will throw error while retrieving data. Below are some points you check to resolve the issue.
    - If you are using a!queryEntity, try to fetch only selected columns using selection attribute, this will reduce the data size of returned data.
    - If this is memory issue, there are properties from Appian side you need to update to increase the limit for the data,
    refer this link for more details,
    forum.appian.com/.../Post-Install_Configurations.html
    - If this is not a memory issue, then u can check in there is any corrupted data in DB which you are trying to retrieve.

    Hope this gives you some pointers.
    ~ Ashish
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  • Hi Rajashekhar,

    This issue might occur if the size of the data is more that 1 MB (This is the default limit for the query rule). OR DB is having corrupted data.
    - You can check if the rule which is returning the data is working fine and returning data correctly (If data is large). If this is memory issue this will throw error while retrieving data. Below are some points you check to resolve the issue.
    - If you are using a!queryEntity, try to fetch only selected columns using selection attribute, this will reduce the data size of returned data.
    - If this is memory issue, there are properties from Appian side you need to update to increase the limit for the data,
    refer this link for more details,
    forum.appian.com/.../Post-Install_Configurations.html
    - If this is not a memory issue, then u can check in there is any corrupted data in DB which you are trying to retrieve.

    Hope this gives you some pointers.
    ~ Ashish
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