Changes between Initial Version and Version 1 of Ticket #121


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Timestamp:
10/10/2014 05:15:09 PM (12 years ago)
Author:
luoyongmin
Comment:

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  • Ticket #121 – Description

    initial v1  
    11升级Memcache步骤见附件：IT商城memcache升级.txt 
     21、升级后发现编辑报障有个别商情页有报错。 
     32、查看memcache使用概况。登陆memcache所在服务器，使用命令xmem参看。 
     4未发现memcache异常 
     53、查看应用日志 
     6发现有memcache异常信息，stderr_m.pconline.log： 
     7[10-09 14:24:32.841] 13404745 [http-m.pconline-8082-39] ERROR com.danga.MemCached.MemCachedClient - ++++ exception thrown while trying to get object from cache for key: /company_price_new.jsp?productID=558826&area=全国&pageSize=20&pageNo=1&part=2 
     8[10-09 14:24:32.841] 13404745 [http-m.pconline-8082-39] ERROR com.danga.MemCached.MemCachedClient - MemcachedClient Error! Expect key:/company_price_new.jsp?productID=558826&area=全国&pageSize=20&pageNo=1&part=2, but return key: /company_price_new.jsp?productID=558826&area=??????ú&pageSize=20&pageNo=1&part=2 
     9[10-09 14:24:32.841] java.lang.RuntimeException: MemcachedClient Error! Expect key:/company_price_new.jsp?productID=558826&area=全国&pageSize=20&pageNo=1&part=2, but return key: /company_price_new.jsp?productID=558826&area=??????ú&pageSize=20&pageNo=1&part=2 
     10[10-09 14:24:32.843]    at com.schooner.MemCached.AscIIClient.get(AscIIClient.java:735) 
     11[10-09 14:24:32.843]    at com.schooner.MemCached.AscIIClient.get(AscIIClient.java:630) 
     12[10-09 14:24:32.843]    at com.schooner.MemCached.AscIIClient.get(AscIIClient.java:626) 
     13[10-09 14:24:32.843]    at com.danga.MemCached.MemCachedClient.get(MemCachedClient.java:1094) 
     14[10-09 14:24:32.843]    at cn.com.pconline.enterprise.web.tag.CacheTag.doStartTag(CacheTag.java:372) 
     15[10-09 14:24:32.843]    at _jsp._yp._company_0price__jsp._jspService(_company_0price__jsp.java:1079) 
     164、判断是memcache对特殊字符处理出错 
     175、修复 
     18修改CacheTag.java，对缓存key进行md5转换[key = cn.com.pconline.enterprise.util.MD5.compute(key)] 
     196、结果 
     20经过md5转换后的key不再抛出异常 
     21 
     22总结： 
     23升级memcache要注意key的不同处理方式的兼容性。升级后留意观察日志。