tomcat jvm 参数丢失

Question

我想运行 tomcat 使用 javaagent。

setenv.sh:

export JAVA_HOME=/home/ggfan/1-install/java/jdk1.8.0_271
export CATALINA_OPTS="${CATALINA_OPTS} -javaagent:/home/ggfan/2-work/centuari-space/jdbc-leak-detector/target/jdbcld.jar=/home/ggfan/3-tmp/logs/jdbcld,INFO,org.apache.commons.dbcp.PoolingDataSource$PoolGuardConnectionWrapper"

调用 startup.sh，看来 tomcat 选对了：

[ggfan@localhost bin]$ ./startup.sh 
Using CATALINA_BASE:   /home/ggfan/1-install/apache-tomcat-8.5.64
Using CATALINA_HOME:   /home/ggfan/1-install/apache-tomcat-8.5.64
Using CATALINA_TMPDIR: /home/ggfan/1-install/apache-tomcat-8.5.64/temp
Using JRE_HOME:        /home/ggfan/1-install/java/jdk1.8.0_271
Using CLASSPATH:       /home/ggfan/1-install/apache-tomcat-8.5.64/bin/bootstrap.jar:/home/ggfan/1-install/apache-tomcat-8.5.64/bin/tomcat-juli.jar
Using CATALINA_OPTS:    -javaagent:/home/ggfan/2-work/centuari-space/jdbc-leak-detector/target/jdbcld.jar=/home/ggfan/3-tmp/logs/jdbcld,INFO,org.apache.commons.dbcp.PoolingDataSource$PoolGuardConnectionWrapper
Tomcat started.

然而，来自 tomcat 日志：

24-Sep-2021 15:45:04.437 信息 [main] org.apache.catalina.startup.VersionLoggerListener.log 命令行参数：       -javaagent:/home/ggfan/2-work/centuari-space/jdbc-leak-detector/target/jdbcld.jar=/home/ggfan/3-tmp/logs/jdbcld,INFO,org.apache.commons.dbcp.PoolingDataSource

内部 class '$' 符号后的名称丢失，我的 javaagent 收到的真实参数是不完整的。

怎么了？

我是运行 tomcat Fedora 31 上的 Apache Tomcat/8.5.64

Answer 1

为了将 CATALINA_OPTS 拆分为单词并将它们作为参数传递给 java，catalina.sh 脚本使用 eval:

eval exec "\"$_RUNJAVA\"" "\"$CATALINA_LOGGING_CONFIG\"" $LOGGING_MANAGER "$JAVA_OPTS" "$CATALINA_OPTS" \
...

这显然对$PoolGuardConnectionWrapper进行了变量扩展。为防止这种转义美元符号两次：

export CATALINA_OPTS="${CATALINA_OPTS} ...PoolingDataSource\$PoolGuardConnectionWrapper"

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