How to fix: java.lang.NoSuchMethodError: org.apache.logging.log4j.ThreadContext.getThreadContextMap()

Check whether an older version of the log4j-api module is also on the classpath and it is loaded before the newer version.

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An EC2 spot instance is interrupted/unavailble due to following reasons

- Price — Since the spot price can rise above your bid price anytime. If the Spot price is greater than your maximum price, the instance wil...