nacos启动“找不到或无法加载主类 ”java.lang.ClassNotFoundException:

从官网下载的Nacos编译之后的包，启动时报如下错误：

错误：找不到或无法加载主类

原因：java.lang.ClassNotFoundException:

导致该问题的主要原因是Nacos对JDK 11不兼容导致的。因此，最直接的方案是换JDK，比如采用JDK 8等。

如果无法换JDK，则可修改启动脚本：

Version: 2.0.3
jdk version: 11.0.10
os: mac 11.1

How to Reproduce：

Modify the startup script（startup.sh）
The original script is: nohup "$JAVA" "$JAVA_OPT_EXT_FIX" ${JAVA_OPT} nacos.nacos >> ${BASE_DIR}/logs/start.out 2>&1 &
Try the modified script is : nohup ${JAVA} ${JAVA_OPT_EXT_FIX} ${JAVA_OPT} nacos.nacos >> ${BASE_DIR}/logs/start.out 2>&1 &
others:

If the build command is mvn clean compile && mvn -Prelease-nacos -Dmaven.test.skip=true clean install -U.and the parameter path("${JAVA_OPT} -jar ${BASE_DIR}/target/${SERVER}.jar") in the script is inconsistent with the actual path,and The actual build path is ("${JAVA_OPT} -jar ${BASE_DIR}/target/${PROJECT_VERSION}/target/${SERVER}.jar").
the script can be modified or the jar location can be moved.

或：

Under bin / startup.sh
JAVA_ OPT_ EXT_ FIX configuration will cause JDK11 error

please replace bin / startup.sh

x JAVA_ OPT_ EXT_ FIX="-Djava.ext.dirs=${JAVA_ HOME}/jre/lib/ext:${JAVA_ HOME}/lib/ext"
√ JAVA_ OPT="${JAVA_ OPT} -Djava.ext.dirs=${JAVA_ HOME}/jre/lib/ext:${JAVA_ HOME}/lib/ext"

x echo "$JAVA $JAVA_ OPT_ EXT_ FIX ${JAVA_ OPT}"
√ echo "$JAVA ${JAVA_ OPT}"

x echo "$JAVA $JAVA_ OPT_ EXT_ FIX ${JAVA_ OPT}" > ${BASE_ DIR}/logs/start.out 2>&1 &
x nohup "$JAVA" "$JAVA_ OPT_ EXT_ FIX" ${JAVA_ OPT} nacos.nacos >> ${BASE_ DIR}/logs/start.out 2>&1 &
√ echo "$JAVA ${JAVA_ OPT}" > ${BASE_ DIR}/logs/start.out 2>&1 &
√ nohup $JAVA ${JAVA_ OPT} nacos.nacos >> ${BASE_ DIR}/logs/start.out 2>&1 &

nacos启动“找不到或无法加载主类 ”java.lang.ClassNotFoundException:插图1