tomcat假死的各种资料

Tomcat假死排查https://www.jianshu.com/p/8846db296fad

发现的问题线索：

1.打开tomcat的Catalina.log文件

2.打开ngnix的error.log文件

3.运行

ps:9080为端口号

netstat -ano|grep 9080

运行

netstat -n | awk '/^tcp/ {++S[$NF]} END {for(a in S) print a, S[a]}'

根据查的到这些问题进行查询

冷静对待你遇到的所有Java内存异常https://zazalu.space/2019/09/17/java-memory-error-solution-Theoretically/

Tomcat假死问题排查：java.lang.OutOfMemoryError: PermGen spacehttps://blog.youkuaiyun.com/weixin_39309402/article/details/106848972?utm_medium=distribute.pc_relevant_download.none-task-blog-baidujs-1.nonecase&depth_1-utm_source=distribute.pc_relevant_download.none-task-blog-baidujs-1.nonecase

百度：java.lang.OutOfMemoryError: Java heap space

Linux网络tcp连接大量CLOSE_WAIT和TIME_WAIT状态的出现和解决方法https://www.cnblogs.com/sea520/p/12611690.html

HttpClient连接池抛出大量ConnectionPoolTimeoutException: Timeout waiting for connection异常排查https://blog.youkuaiyun.com/shootyou/article/details/6615051

百度：SSM druid连接池抛出大量close wait

使用druid连接池带来的坑testOnBorrow=falsehttps://www.cnblogs.com/zhoading/p/8072882.html

Druid 连接池配置的详解及使用时后台出现大量的close_wait 的日志信息https://blog.youkuaiyun.com/donkeyboy001/article/details/104102533

tcp连接出现close_wait状态？可能是代码不够健壮https://www.cnblogs.com/grey-wolf/p/9945637.html

DRUID连接池的实用 配置详解https://blog.youkuaiyun.com/zhangjinwei417/article/details/92823438

第二天发现又是。。。fuck

tomcat 配置ssl/https 证书问题（一）- No enum constant org.apache.tomcat.util.net.SSLHostConfigCertificate.Typhttps://blog.youkuaiyun.com/DAMMXX/article/details/78205799?utm_source=blogxgwz7

但是，端口号终于没炸了

原因排查

Nginx: 104: Connection reset by peer 错误https://blog.youkuaiyun.com/zzhongcy/article/details/89090193

问题：

处理：

client_header_buffer_size 64k;
large_client_header_buffers 4 64k;
client_body_buffer_size 20m;
fastcgi_buffer_size 128k;
fastcgi_buffers 4 128k;
fastcgi_busy_buffers_size 256k;
gzip_buffers 16 8k;
proxy_buffer_size 64k;
proxy_buffers 4 128k;
proxy_busy_buffers_size 256k;
 
keepalive_timeout 240;
fastcgi_connect_timeout 600;
fastcgi_send_timeout 600;
fastcgi_read_timeout 600;
 
proxy_connect_timeout 600s;
proxy_send_timeout 1200;
proxy_read_timeout 1200;

参考：Nginx: 104: Connection reset by peer 错误https://blog.youkuaiyun.com/zzhongcy/article/details/89090193

第三天
tomcat的catalina.log文件

我还在井里…

一次完整的JVM堆外内存泄漏故障排查记录https://www.cnblogs.com/rude3knife/p/13570423.html