Briefly, this error occurs when Elasticsearch encounters a complex nested exception that it tries to unwrap for 10 levels but fails to find the root cause. This usually happens due to deeply nested data structures or recursive calls. To resolve this issue, you can try to simplify your data structures, avoid recursive calls, or increase the unwrapping levels limit. However, increasing the limit should be done with caution as it might lead to performance issues. It’s also important to check your logs for any specific issues that might be causing the exception.
This guide will help you check for common problems that cause the log ” Exception cause unwrapping ran for 10 levels… ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: .
Log Context
Log “Exception cause unwrapping ran for 10 levels…” classname is ExceptionsHelper.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :
if (result.getCause() == result) {
return result;
}
if (counter++ > 10) {
// dear god; if we got more than 10 levels down; WTF? just bail
logger.warn("Exception cause unwrapping ran for 10 levels..."; t);
return result;
}
result = result.getCause();
}
return result;
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