java - Problems from Tomcat using different JDK as recommended by vendor -


we have confluence running on tomcat on linux server. vendor stated should use jdk7 , not new one. given mistake in past, jdk has been upgraded jdk7 jdk8. cought after months of operation.

my question is: implications can there if run using different jdk?

java versions backward compatible: oracle takes great care make sure java program works on older java version work on newer java version. should work without need make changes program.

despite great care oracle takes, it's possible there small incompatibilities. each new version of jdk comes documentation explains these possible incompatibilities older versions. jdk8, see: compatibility guide jdk 8.

however, it's still possible write java programs won't work correctly on future java versions, example when directly use classes supposed internal jdk (see: why developers should not write programs call 'sun' packages).

with regard confluence, it's case vendor didn't formally test version of confluence using java 8, don't want formally guarantee works , give support it, although might in practice not problem @ all.


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