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I have written before update trigger on an object. In that trigger I am invoking batch Apex to update the same object records but in apexjob am getting error like this

First error: Update failed. First exception on row 0 with id a0A9000000V5kLGEAZ; >First error: CANNOT_INSERT_UPDATE_ACTIVATE_ENTITY, CandidateUpdate: execution of AfterUpdate caused by: System.AsyncException: Database.executeBatch cannot be called from...

What should I do to avoid this error?

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  • Can you include the code that you are having difficulties with?
    – Joseph U.
    Mar 30, 2015 at 0:21

2 Answers 2

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You can't perform an update from a before trigger or call anything that invokes an update. You need make your trigger an After Update.

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Move the batch call to after insert.

You will have to write some logic to avoid recursive updates on record. Trigger updates record -> batch updates record in same object -> again trigger fires and it loops till hitting limit.

Also be careful while calling batch class from trigger. If same batch is in queue more than 5 times, code will fail with "Maximum concurrent batches exceeded" exception. So if five users are updating records at the same time, you may hit this limit.

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