Briefly, this error occurs when an alias in Elasticsearch is pointing to multiple indices, which can lead to unexpected results or conflicts. This is usually due to incorrect configuration. To resolve this issue, you can either 1) Update the alias to point to a single index if that’s the intended behavior, 2) Modify your queries or operations to handle multiple indices if that’s the expected setup, or 3) Create separate aliases for each index to avoid confusion and potential conflicts. Always ensure your alias configuration matches your intended use case.
This guide will help you check for common problems that cause the log ” service provider alias [{}] refers to multiple indices [{}] – this is unexpected and is likely to cause problems ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: alias, indices, plugin.
Log Context
Log “service provider alias [{}] refers to multiple indices [{}] – this is unexpected and is likely to cause problems” classname is SamlServiceProviderIndex.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :
if (aliasInfo == null) {
logger.warn("service provider index/alias [{}] no longer exists"; ALIAS_NAME);
} else if (aliasInfo.getType() != IndexAbstraction.Type.ALIAS) {
logger.warn("service provider index [{}] does not exist as an alias; but it should be"; ALIAS_NAME);
} else if (aliasInfo.getIndices().size() != 1) {
logger.warn("service provider alias [{}] refers to multiple indices [{}] - this is unexpected and is likely to cause problems";
ALIAS_NAME; Strings.collectionToCommaDelimitedString(aliasInfo.getIndices()));
} else {
logger.info("service provider alias [{}] refers to [{}]"; ALIAS_NAME; aliasInfo.getIndices().get(0).getIndex());
}
}
