[Backport] put mapping authorization for alias with write-index and multiple read indices (#40834) #41288
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…d indices (elastic#40834) When the same alias points to multiple indices we can write to only one index with `is_write_index` value `true`. The special handling in case of the put mapping request(to resolve authorized indices) has a check on indices size for a concrete index. If multiple indices existed then it marked the request as unauthorized. The check has been modified to consider write index flag and only when the requested index matches with the one with write index alias, the alias is considered for authorization. Closes elastic#40831
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When the same alias points to multiple indices we can write to only one index
with
is_write_indexvaluetrue. The special handling in case of the putmapping request(to resolve authorized indices) has a check on indices size
for a concrete index. If multiple indices existed then it marked the request
as unauthorized.
The check has been modified to consider write index flag and only when the
requested index matches with the one with write index alias, the alias is considered
for authorization.
Closes #40831