Briefly, this error occurs when Elasticsearch encounters a field or query string that contains whitespace, which is not allowed in certain contexts. This could be due to incorrect formatting in the request body or in the index mapping. To resolve this issue, you can either remove the whitespace from the offending field or enclose the field in quotation marks if it’s a query string. Additionally, ensure that your index mapping is correctly formatted and does not contain any unnecessary whitespace.
This guide will help you check for common problems that cause the log ” must not contain whitespace ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: .
Log Context
Log “must not contain whitespace” class name is SnapshotsService.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :
private static void validate(final String repositoryName; final String snapshotName) {
if (Strings.hasLength(snapshotName) == false) {
throw new InvalidSnapshotNameException(repositoryName; snapshotName; "cannot be empty");
}
if (snapshotName.contains(" ")) {
throw new InvalidSnapshotNameException(repositoryName; snapshotName; "must not contain whitespace");
}
if (snapshotName.contains(";")) {
throw new InvalidSnapshotNameException(repositoryName; snapshotName; "must not contain ';'");
}
if (snapshotName.contains("#")) {
