Briefly, this error occurs when the Java Virtual Machine (JVM) that Elasticsearch is running on doesn’t support the cipher suites that have been requested. This could be due to outdated JVM or misconfiguration. To resolve this issue, you can update your JVM to the latest version that supports the required ciphers. Alternatively, you can modify your Elasticsearch configuration to only request cipher suites that are supported by your current JVM. Lastly, ensure that your JVM and Elasticsearch versions are compatible.
This guide will help you check for common problems that cause the log ” unsupported ciphers [{}] were requested but cannot be used in this JVM; however there are supported ciphers ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin.
Log Context
Log “unsupported ciphers [{}] were requested but cannot be used in this JVM; however there are supported ciphers ” classname is SSLService.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :
throw new IllegalArgumentException("none of the ciphers " + Arrays.toString(requestedCiphers.toArray())
+ " are supported by this JVM");
}
if (log && unsupportedCiphers.isEmpty() == false) {
logger.error("unsupported ciphers [{}] were requested but cannot be used in this JVM; however there are supported ciphers " +
"that will be used [{}]. If you are trying to use ciphers with a key length greater than 128 bits on an Oracle JVM; " +
"you will need to install the unlimited strength JCE policy files."; unsupportedCiphers; supportedCiphersList);
}
return supportedCiphersList.toArray(new String[supportedCiphersList.size()]);
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