java11 --version命令行终于符合linux标准了
java 查看版本的命令大家再熟悉不过了
java -version
但是java 11的写法是这样的
java --version
java -version
java --version
Caused by: org.apache.catalina.LifecycleException: A child container failed during start
at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:950) ~[tomcat-embed-core-8.5.34.jar!/:8.5.34]
at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:872) ~[tomcat-embed-core-8.5.34.jar!/:8.5.34]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) ~[tomcat-embed-core-8.5.34.jar!/:8.5.34]
... 6 common frames omitted
Caused by: java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Tomcat].StandardHost[localhost].TomcatEmbeddedContext[]]
at java.util.concurrent.FutureTask.report(FutureTask.java:122) ~[na:1.8.0_121]
at java.util.concurrent.FutureTask.get(FutureTask.java:192) ~[na:1.8.0_121]
at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:942) ~[tomcat-embed-core-8.5.34.jar!/:8.5.34]
... 8 common frames omitted
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Tomcat].StandardHost[localhost].TomcatEmbeddedContext[]]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:167) ~[tomcat-embed-core-8.5.34.jar!/:8.5.34]
... 6 common frames omitted
Caused by: org.apache.catalina.LifecycleException: Failed to start component [org.apache.catalina.webresources.StandardRoot@3a147ae1]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:167) ~[tomcat-embed-core-8.5.34.jar!/:8.5.34]
at org.apache.catalina.core.StandardContext.resourcesStart(StandardContext.java:4907) ~[tomcat-embed-core-8.5.34.jar!/:8.5.34]
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5042) ~[tomcat-embed-core-8.5.34.jar!/:8.5.34]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) ~[tomcat-embed-core-8.5.34.jar!/:8.5.34]
... 6 common frames omitted
Caused by: java.lang.IllegalArgumentException: The main resource set specified [/tmp/tomcat-docbase.6227775345915450173.2222] is not valid
at org.apache.catalina.webresources.StandardRoot.createMainResourceSet(StandardRoot.java:748) ~[tomcat-embed-core-8.5.34.jar!/:8.5.34]
at org.apache.catalina.webresources.StandardRoot.startInternal(StandardRoot.java:706) ~[tomcat-embed-core-8.5.34.jar!/:8.5.34]
最后发现是磁盘满了,
使用下面的命令查看磁盘使用情况
df -h
发现/dev/vda1 磁盘占用100%,然后查看/tmp日志的情况
du -sh /tmp
发现spring cloud gateway 占用了大量的日志文件
删掉后,发现并没有减少,使用命令
lsof | grep delete
发现这些删除,但是被程序占用了的文件,只有新启动gateway 程序,日志文件才被删除,解决。
令人激动的java 11终于发布了,而且是长期支持版。
本来想下载个beta版尝试,结果昨天就出了,真是令人激动。
圈圈比较关注的特点摘要:
更多特性发现中。
本来准备用用户的邮箱生成唯一邀请码,但是发现java中String的hashCode并不唯一。
class Main {
public static void main(String[] args) {
String a = new String("FB");
String b = new String("Ea");
System.out.println(a.hashCode());
System.out.println(b.hashCode());
}
}
输出结果可以看这个链接 https://repl.it/repls/SameCloudyCgi