Failed to load plugin class [org.elasticsearch.xpack.core.XPackPlugin]

Elastic Stack Elasticsearch
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1

Hi All,
I am trying to install Elasticsearch 6.8.23 Opensource version in Docker swarm. What I understand from document i that xpack is available in free version to implement node & http communication.
Please correct me if I am wrong.

I have configured cert in pem format and coped all cert at /usr/share/Elasticsearch/config path and followed the document but getting below error:

< [2022-02-07T23:07:56,369][WARN ][o.e.b.ElasticsearchUncaughtExceptionHandler] [XXXXXX] uncaught exception in thread [main]

org.elasticsearch.bootstrap.StartupException: java.lang.IllegalStateException: failed to load plugin class [org.elasticsearch.xpack.core.XPackPlugin]

at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:163) ~[elasticsearch-6.8.23.jar:6.8.23]

at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:150) ~[elasticsearch-6.8.23.jar:6.8.23]

at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:86) ~[elasticsearch-6.8.23.jar:6.8.23]

at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:124) ~[elasticsearch-cli-6.8.23.jar:6.8.23]

at org.elasticsearch.cli.Command.main(Command.java:90) ~[elasticsearch-cli-6.8.23.jar:6.8.23]

at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:116) ~[elasticsearch-6.8.23.jar:6.8.23]

at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:93) ~[elasticsearch-6.8.23.jar:6.8.23]

Caused by: java.lang.IllegalStateException: failed to load plugin class [org.elasticsearch.xpack.core.XPackPlugin]>

then log also report error for file path
<Caused by: java.nio.file.NoSuchFileException: /usr/share/elasticsearch/config/[ "/usr/share/elasticsearch/config/ca.pem" ]
	at sun.nio.fs.UnixException.translateToIOException(UnixException.java:92) ~[?:?]
	at sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:106) ~[?:?]
	at sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:111) ~[?:?]
	at sun.nio.fs.UnixFileSystemProvider.newByteChannel(UnixFileSystemProvider.java:218) ~[?:?]
	at java.nio.file.Files.newByteChannel(Files.java:375) ~[?:?]
	at java.nio.file.Files.newByteChannel(Files.java:426) ~[?:?]
	at java.nio.file.spi.FileSystemProvider.newInputStream(FileSystemProvider.java:420) ~[?:?]
	at java.nio.file.Files.newInputStream(Files.java:160) ~[?:?]
	at org.elasticsearch.xpack.core.ssl.CertParsingUtils.readCertificates(CertParsingUtils.java:93) ~[?:?]
	at org.elasticsearch.xpack.core.ssl.CertParsingUtils.readCertificates(CertParsingUtils.java:86) ~[?:?]
	at org.elasticsearch.xpack.core.ssl.PEMTrustConfig.createTrustManager(PEMTrustConfig.java:45) ~[?:?]
	at org.elasticsearch.xpack.core.ssl.SSLService.createSslContext(SSLService.java:394) ~[?:?]
	at java.util.HashMap.computeIfAbsent(HashMap.java:1224) ~[?:?]
	at org.elasticsearch.xpack.core.ssl.SSLService.lambda$loadSSLConfigurations$4(SSLService.java:448) ~[?:?]
	at java.util.HashMap.forEach(HashMap.java:1425) ~[?:?]
	at org.elasticsearch.xpack.core.ssl.SSLService.loadSSLConfigurations(SSLService.java:436) ~[?:?]>

Please let me know what I am missing or its not supported in free version of elastic.

2

There's no open source version of 6.8.23 - Elasticsearch 6.8.23 | Elastic. Can you please confirm what you downloaded.

Are you sure you have things where you think they are?

3

I am using this image:
docker pull docker.elastic.co/elasticsearch/elasticsearch:6.8.23

5

Yes my all cert files are inside /usr/sahre/Elasticsearch/config path has proper permission for Elasticsearch user.

6

My guess is that you've entered YAML syntax into an environment variable to configure Elasticsearch.
That doesn't work.

I think you have something like this in your docker-compose.yml

- xpack.security.transport.ssl.certificate_authorities='[ "/usr/share/elasticsearch/config/ca.pem" ]'

But you need

- xpack.security.transport.ssl.certificate_authorities="/usr/share/elasticsearch/config/ca.pem"
7

let me try, I tried that but after omiting path :slight_smile:

8

Thanks I am able to resolve the issue.
But now Elastic api is asking for credentials, Can't we use SSL communication without any type of authentication.

9

SSL is part of Elasticsearch security. You cannot enable & disable them separately.
However, you can enable anonymous access if you want.

10

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