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FULL PRODUCT VERSION : java version "1.8.0_152" Java(TM) SE Runtime Environment (build 1.8.0_152-b16) Java HotSpot(TM) 64-Bit Server VM (build 25.152-b16, mixed mode) ADDITIONAL OS VERSION INFORMATION : Verified with "Ubuntu 16.04.3 LTS x64" and "Ubuntu 14.04.5 LTS" A DESCRIPTION OF THE PROBLEM : newer zlib 1.2.11 in java 8u152/8u151 doesn't work. REGRESSION. Last worked in version 8u151 STEPS TO FOLLOW TO REPRODUCE THE PROBLEM : Could be reproducible even with simple tomcat app: curl http://localhost:8080/myapp/global.css -H 'Accept-Encoding: gzip' --compressed -o/dev/null ;echo $? % Total % Received % Xferd Average Speed Time Time Time Current Dload Upload Total Spent Left Speed 0 0 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0 curl: (23) Error while processing content unencoding: invalid block type 23 ERROR MESSAGES/STACK TRACES THAT OCCUR : Here is the tomcat log: java.util.zip.ZipException: invalid block type REPRODUCIBILITY : This bug can be reproduced always. CUSTOMER SUBMITTED WORKAROUND : Replace jre/lib/amd64/libzip.so file with one from jdk 8u144