Got unter Fehler beim Upgrade Elasticsearch von 1,7 bis 2.3.3Elastic Suche: java.lang.NoClassDefFoundError: Es konnte keine Klasse org.apache.log4j.LogManager
java.lang.NoClassDefFoundError: Could not initialize class org.apache.log4j.LogManager
at org.apache.log4j.Logger.getLogger(Logger.java:104)
at org.elasticsearch.common.logging.log4j.Log4jESLoggerFactory.newInstance(Log4jESLoggerFactory.java:38)
at org.elasticsearch.common.logging.ESLoggerFactory.newInstance(ESLoggerFactory.java:82)
at org.elasticsearch.common.logging.ESLoggerFactory.getLogger(ESLoggerFactory.java:66)
at org.elasticsearch.common.logging.Loggers.getLogger(Loggers.java:121)
at org.elasticsearch.common.settings.Settings.<clinit>(Settings.java:63)