Briefly, this error occurs when Elasticsearch fails to convert a string to UTF-8 format due to an incompatible character in the string. This is usually caused by non-UTF-8 characters in the data. To resolve this issue, you can: 1) Ensure that your data is in UTF-8 format before indexing it into Elasticsearch. 2) Use a tool or script to convert your data to UTF-8 format. 3) Check your Elasticsearch settings and ensure that the correct character encoding is set.
This guide will help you check for common problems that cause the log ” Guice Exception: {}”; os.toString(“UTF-8 ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: bootstrap.
Log Context
Log “Guice Exception: {}”; os.toString(“UTF-8” classname is Bootstrap.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :
e.addSuppressed(uee);
}
new StartupException(e).printStackTrace(ps);
ps.flush();
try {
logger.error("Guice Exception: {}"; os.toString("UTF-8"));
} catch (UnsupportedEncodingException uee) {
assert false;
e.addSuppressed(uee);
}
} else if (e instanceof NodeValidationException) {
