Could not find or load main class org.elasticsearch.plugins.PluginManagerCliParser

Elastic Stack Elasticsearch
1

I am trying to upgrade ES from 2.0.1 to 5.5.1, elasticsearch-5.5.1.jar giving follow error:
Could not find or load main class org.elasticsearch.plugins.PluginManagerCliParser

What is the proper way to upgrade ES from 2.0.1 to 5.5.1?
I am simply replacing lib folder jars into existing one, because our application has custom ssl plugins and infrastructure stuff.

2

The lib directory is not sufficient. You should remove your existing installation, and install a fresh copy of the new elasticsearch version. In this case, it seems you are still using the old bin scripts.

3

I compared the bin folder and patch in the differences, now bin/plugin uses PluginManagerCliParser, so this error is resolved.

Now next hurdle, What does this exception mean:

Exception in thread "main" java.lang.NoSuchFieldError: LUCENE_5_3_1
at org.elasticsearch.Version.(Version.java:51)
at org.elasticsearch.common.io.stream.StreamOutput.(StreamOutput.java:74)
at org.elasticsearch.common.io.stream.BytesStream.(BytesStream.java:24)
at org.elasticsearch.common.io.stream.BytesStreamOutput.(BytesStreamOutput.java:59)
at org.elasticsearch.common.io.stream.BytesStreamOutput.(BytesStreamOutput.java:56)
at org.elasticsearch.common.io.stream.BytesStreamOutput.(BytesStreamOutput.java:46)
at org.elasticsearch.common.xcontent.XContentBuilder.builder(XContentBuilder.java:69)
at org.elasticsearch.common.settings.Setting.arrayToParsableString(Setting.java:868)
at org.elasticsearch.common.settings.Setting.lambda$listSetting$29(Setting.java:814)
at org.elasticsearch.common.settings.Setting$2.getRaw(Setting.java:818)
at org.elasticsearch.common.settings.Setting.lambda$listSetting$27(Setting.java:802)
at org.elasticsearch.common.settings.Setting.listSetting(Setting.java:807)
at org.elasticsearch.common.settings.Setting.listSetting(Setting.java:802)
at org.elasticsearch.env.Environment.(Environment.java:60)
at org.elasticsearch.node.InternalSettingsPreparer.prepareEnvironment(InternalSettingsPreparer.java:90)
at org.elasticsearch.cli.EnvironmentAwareCommand.createEnv(EnvironmentAwareCommand.java:72)
at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:67)
at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:122)
at org.elasticsearch.cli.MultiCommand.execute(MultiCommand.java:69)
at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:122)
at org.elasticsearch.cli.Command.main(Command.java:88)
at org.elasticsearch.plugins.PluginCli.main(PluginCli.java:47)

4

After removing old lucene jar, only keep new lucene jar from 5.5.1, the above exception is gone.

5

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