Exception in thread "main" java.lang.IllegalStateException: Failed to get nested archive for entry BOOT-INF/lib/mysql-connector-java-5.1.27.jar at org.springframework.boot.loader.archive.JarFileArchive.getNestedArchive(JarFileArchive.java:109) at org.springframework.boot.loader.archive.JarFileArchive.getNestedArchives(JarFileArchive.java:87) at org.springframework.boot.loader.ExecutableArchiveLauncher.getClassPathArchives(ExecutableArchiveLauncher.java:72) at org.springframework.boot.loader.Launcher.launch(Launcher.java:49) at org.springframework.boot.loader.JarLauncher.main(JarLauncher.java:51) Caused by: java.io.IOException: Unable to open nested jar file 'BOOT-INF/lib/mysql-connector-java-5.1.27.jar' at org.springframework.boot.loader.jar.JarFile.getNestedJarFile(JarFile.java:252) at org.springframework.boot.loader.jar.JarFile.getNestedJarFile(JarFile.java:237) at org.springframework.boot.loader.archive.JarFileArchive.getNestedArchive(JarFileArchive.java:104) ... 4 more Caused by: java.lang.IllegalStateException: Unable to open nested entry 'BOOT-INF/lib/mysql-connector-java-5.1.27.jar'. It has been compressed and nested jar files must be stored without compression. Please check the mechanism used to create your executable jar file at org.springframework.boot.loader.jar.JarFile.createJarFileFromFileEntry(JarFile.java:285) at org.springframework.boot.loader.jar.JarFile.createJarFileFromEntry(JarFile.java:260) at org.springframework.boot.loader.jar.JarFile.getNestedJarFile(JarFile.java:248) ... 6 more