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Briefly, this error occurs when Elasticsearch encounters a malformed regular expression file. This typically happens when the JSON structure of the file is incorrect, specifically when an ‘object’ is followed by something other than an ‘array’. To resolve this issue, you should review the JSON file for any syntax errors. Ensure that every ‘object’ is followed by an ‘array’ as expected. You may also use a JSON validator tool to check the structure of your file. Additionally, ensure that your Elasticsearch version supports the regular expression used in your file.
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This guide will help you check for common problems that cause the log ” malformed regular expression file; should continue with ‘array’ after ‘object’ ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: .
Log “malformed regular expression file; should continue with ‘array’ after ‘object'” class name is UserAgentParser.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :
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