Hi
I got following exception when I changed cashing class(M_SitePolicy
class) . I have read related post and understand that I must remove
previous cashed object and put serialVersionUID to my M_SitePolicy
class to avoid recurrence of this kind of error.
So I put serialVersionUID = 2001 to M_SitePolicy class and add
following program to overwrite exsisting cash by new one.
Program.
public static void SitePolicy_Clear()
{
try
{
CacheFactory cacheFactory =
javax.cache.CacheManager.getInstance
().getCacheFactory();
CasheSitePolicy =
cacheFactory.createCache(Collections.emptyMap());
javax.cache.CacheManager.getInstance().registerCache
(CashSitePolicyID, CasheSitePolicy);
}
catch (CacheException e)
{
App.RecordLog(" --- CreateCashSitePolicyFailed --- " +
e.toString
());
}
}
But still I have same exception. Why? and What is proper counter
measure?
My app is chainofasker.appspot.com So if these data is not enough,
please refer to this location.
Thank you.
------ memcache.InvalidValueException caused by
java.io.InvalidClassException
/UpDateDB
com.google.appengine.api.memcache.InvalidValueException: IO exception
parsing value of 'COA'
at com.google.appengine.api.memcache.MemcacheServiceImpl.get
(MemcacheServiceImpl.java:249)
at com.google.appengine.api.memcache.stdimpl.GCache.get(GCache.java:
157)
at askerDB.AppCash.SitePolicy_Get(AppCash.java:479)
at askerDB.M_SitePolicy.GetSitePolicy(M_SitePolicy.java:34)
at askerDB.S_UpDateDB.doPost(S_UpDateDB.java:113)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:713)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:806)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:
487)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter
(ServletHandler.java:1093)
at com.google.apphosting.runtime.jetty.SaveSessionFilter.doFilter
(SaveSessionFilter.java:35)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter
(ServletHandler.java:1084)
at
com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter
(TransactionCleanupFilter.java:43)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter
(ServletHandler.java:1084)
at org.mortbay.jetty.servlet.ServletHandler.handle
(ServletHandler.java:360)
at org.mortbay.jetty.security.SecurityHandler.handle
(SecurityHandler.java:216)
at org.mortbay.jetty.servlet.SessionHandler.handle
(SessionHandler.java:181)
at org.mortbay.jetty.handler.ContextHandler.handle
(ContextHandler.java:712)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:
405)
at com.google.apphosting.runtime.jetty.AppVersionHandlerMap.handle
(AppVersionHandlerMap.java:237)
at org.mortbay.jetty.handler.HandlerWrapper.handle
(HandlerWrapper.java:139)
at org.mortbay.jetty.Server.handle(Server.java:313)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:
506)
at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete
(HttpConnection.java:830)
at com.google.apphosting.runtime.jetty.RpcRequestParser.parseAvailable
(RpcRequestParser.java:76)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:381)
at
com.google.apphosting.runtime.jetty.JettyServletEngineAdapter.serviceRequest
(JettyServletEngineAdapter.java:139)
at com.google.apphosting.runtime.JavaRuntime.handleRequest
(JavaRuntime.java:235)
at com.google.apphosting.base.RuntimePb$EvaluationRuntime
$6.handleBlockingRequest(RuntimePb.java:4950)
at com.google.apphosting.base.RuntimePb$EvaluationRuntime
$6.handleBlockingRequest(RuntimePb.java:4948)
at com.google.net.rpc.impl.BlockingApplicationHandler.handleRequest
(BlockingApplicationHandler.java:24)
at com.google.net.rpc.impl.RpcUtil.runRpcInApplication(RpcUtil.java:
359)
at com.google.net.rpc.impl.Server$2.run(Server.java:823)
at com.google.tracing.LocalTraceSpanRunnable.run
(LocalTraceSpanRunnable.java:56)
at com.google.tracing.LocalTraceSpanBuilder.internalContinueSpan
(LocalTraceSpanBuilder.java:516)
at com.google.net.rpc.impl.Server.startRpc(Server.java:778)
at com.google.net.rpc.impl.Server.processRequest(Server.java:351)
at com.google.net.rpc.impl.ServerConnection.messageReceived
(ServerConnection.java:437)
at com.google.net.rpc.impl.RpcConnection.parseMessages
(RpcConnection.java:319)
at com.google.net.rpc.impl.RpcConnection.dataReceived
(RpcConnection.java:290)
at com.google.net.async.Connection.handleReadEvent(Connection.java:
428)
at com.google.net.async.EventDispatcher.processNetworkEvents
(EventDispatcher.java:762)
at com.google.net.async.EventDispatcher.internalLoop
(EventDispatcher.java:207)
at com.google.net.async.EventDispatcher.loop(EventDispatcher.java:
101)
at com.google.net.rpc.RpcService.runUntilServerShutdown
(RpcService.java:251)
at com.google.apphosting.runtime.JavaRuntime$RpcRunnable.run
(JavaRuntime.java:392)
at java.lang.Thread.run(Unknown Source)
Caused by: java.io.InvalidClassException: askerDB.M_SitePolicy; local
class incompatible: stream classdesc serialVersionUID =
-8266186798091049182, local class serialVersionUID = 2001
at java.io.ObjectStreamClass.initNonProxy(Unknown Source)
at java.io.ObjectInputStream.readNonProxyDesc(Unknown Source)
at java.io.ObjectInputStream.readClassDesc(Unknown Source)
at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
at java.io.ObjectInputStream.readObject0(Unknown Source)
at java.io.ObjectInputStream.readObject(Unknown Source)
at com.google.appengine.api.memcache.MemcacheSerialization.deserialize
(MemcacheSerialization.java:163)
at com.google.appengine.api.memcache.MemcacheServiceImpl.get
(MemcacheServiceImpl.java:243)
... 45 more
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