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SOLVED

While starting up AEM instance Getting 503 ERROR

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Level 3

HTTP ERROR: 503

Problem accessing /. Reason:

    AuthenticationSupport service missing. Cannot authenticate request.
1 Accepted Solution

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Correct answer by
Level 3

rajs73651622 This is a very generic message and definitely not enough to point out the problem. However, this may signify some sort of repository inconsistency.

I would suggest you to check for SegmentNotFound errors in the error.log file and in case you find those you can refer to [1] in order to resolve the segment store inconsistencies.

[1] Fix Inconsistencies in the repository when SegmentNotFound Issue is reported in AEM 6.x

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Correct answer by
Level 3

rajs73651622 This is a very generic message and definitely not enough to point out the problem. However, this may signify some sort of repository inconsistency.

I would suggest you to check for SegmentNotFound errors in the error.log file and in case you find those you can refer to [1] in order to resolve the segment store inconsistencies.

[1] Fix Inconsistencies in the repository when SegmentNotFound Issue is reported in AEM 6.x

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Level 1

It may also occur, if you are running AEM instance with a user other than expected user. For example, instance should start using aemuser but u are starting it with root user.