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这与问题Java Appengine APPSTATS causing java out of memory error有关。如何减少Google App Engine上Appstats的内存使用量Java
Appstats似乎在128MB实例上导致java.lang.OutOfMemoryError，我不知道是否有办法减少日志记录的数量。 有没有办法从堆栈跟踪中过滤一些包名？
GAE的API：
@14ms memcache.Get real=7ms api=0ms
Stack:
com.google.appengine.tools.appstats.Recorder:290 makeAsyncCall()
com.google.apphosting.api.ApiProxy:184 makeAsyncCall()
com.google.apphosting.api.ApiProxy:123 makeAsyncCall()
com.google.appengine.api.memcache.MemcacheServiceApiHelper:104 makeAsyncCall()
com.google.appengine.api.memcache.AsyncMemcacheServiceImpl:372 doGetAll()
com.google.appengine.api.memcache.AsyncMemcacheServiceImpl:333 getIdentifiables()
com.google.appengine.api.memcache.MemcacheServiceImpl:61 getIdentifiables()
我参加办法API：
com.googlecode.objectify.cache.EntityMemcache:215 getAll()
com.googlecode.objectify.cache.CachingAsyncDatastoreService:253 get()
com.googlecode.objectify.cache.CachingDatastoreService:161 get()
com.googlecode.objectify.cache.CachingDatastoreService:147 get()
com.googlecode.objectify.cache.CachingDatastoreService:128 get()
siena.gae.GaePersistenceManager:231 getByKey()
siena.Model:106 getByKey()
com.sirtrack.iridium.model.GroupEntity:147 getByKey()
com.sirtrack.iridium.task.ProjectUpdateTask:49 doPost()
无关：
javax.servlet.http.HttpServlet:637 service()
javax.servlet.http.HttpServlet:717 service()
org.mortbay.jetty.servlet.ServletHolder:511 handle()
org.mortbay.jetty.servlet.ServletHandler$CachedChain:1166 doFilter()
com.google.appengine.tools.appstats.AppstatsFilter:141 doFilter()
org.mortbay.jetty.servlet.ServletHandler$CachedChain:1157 doFilter()
org.vosao.filter.SiteFilter:106 doFilter()
org.mortbay.jetty.servlet.ServletHandler$CachedChain:1157 doFilter()
org.vosao.filter.RewriteFilter:79 doFilter()
org.mortbay.jetty.servlet.ServletHandler$CachedChain:1157 doFilter()
org.vosao.filter.AuthenticationFilter:83 doFilter()
org.mortbay.jetty.servlet.ServletHandler$CachedChain:1157 doFilter()
org.vosao.filter.PluginCronFilter:78 doFilter()
org.mortbay.jetty.servlet.ServletHandler$CachedChain:1157 doFilter()
org.vosao.filter.LanguageFilter:66 doFilter()
org.mortbay.jetty.servlet.ServletHandler$CachedChain:1157 doFilter()
org.vosao.filter.UpdateFilter:78 doFilter()
org.mortbay.jetty.servlet.ServletHandler$CachedChain:1157 doFilter()
org.vosao.filter.InitFilter:80 doFilter()
org.mortbay.jetty.servlet.ServletHandler$CachedChain:1157 doFilter()
org.vosao.filter.ContextFilter:74 doFilter()
org.mortbay.jetty.servlet.ServletHandler$CachedChain:1157 doFilter()
com.google.apphosting.utils.servlet.ParseBlobUploadFilter:102 doFilter()
org.mortbay.jetty.servlet.ServletHandler$CachedChain:1157 doFilter()
com.google.apphosting.runtime.jetty.SaveSessionFilter:35 doFilter()
org.mortbay.jetty.servlet.ServletHandler$CachedChain:1157 doFilter()
com.google.apphosting.utils.servlet.TransactionCleanupFilter:43 doFilter()
org.mortbay.jetty.servlet.ServletHandler$CachedChain:1157 doFilter()
org.mortbay.jetty.servlet.ServletHandler:388 handle()
org.mortbay.jetty.security.SecurityHandler:216 handle()
org.mortbay.jetty.servlet.SessionHandler:182 handle()
org.mortbay.jetty.handler.ContextHandler:765 handle()
org.mortbay.jetty.webapp.WebAppContext:418 handle()
com.google.apphosting.runtime.jetty.AppVersionHandlerMap:249 handle()
org.mortbay.jetty.handler.HandlerWrapper:152 handle()
org.mortbay.jetty.Server:326 handle()
org.mortbay.jetty.HttpConnection:542 handleRequest()
org.mortbay.jetty.HttpConnection$RequestHandler:923 headerComplete()
com.google.apphosting.runtime.jetty.RpcRequestParser:76 parseAvailable()
org.mortbay.jetty.HttpConnection:404 handle()
com.google.apphosting.runtime.jetty.JettyServletEngineAdapter:135 serviceRequest()
com.google.apphosting.runtime.JavaRuntime$RequestRunnable:446 run()
com.google.tracing.TraceContext$TraceContextRunnable:449 runInContext()
com.google.tracing.TraceContext$TraceContextRunnable$1:455 run()
com.google.tracing.TraceContext:695 runInContext()
com.google.tracing.TraceContext$AbstractTraceContextCallback:333 runInInheritedContextNoUnref()
com.google.tracing.TraceContext$AbstractTraceContextCallback:325 runInInheritedContext()
com.google.tracing.TraceContext$TraceContextRunnable:453 run()
com.google.apphosting.runtime.ThreadGroupPool$PoolEntry:251 run()
java.lang.Thread:679 run()
下面是可能造成的逐堆栈跟踪OutOfMemoryError异常的堆栈跟踪：
Error for /_ah/queue/projectupdate
java.lang.OutOfMemoryError: Java heap space
at java.util.Arrays.copyOf(Arrays.java:3057)
at java.lang.AbstractStringBuilder.expandCapacity(AbstractStringBuilder.java:117)
at java.lang.AbstractStringBuilder.append(AbstractStringBuilder.java:407)
at java.lang.StringBuffer.append(StringBuffer.java:241)
at java.io.StringWriter.write(StringWriter.java:112)
at java.io.PrintWriter.write(PrintWriter.java:429)
at java.io.PrintWriter.write(PrintWriter.java:446)
at java.io.PrintWriter.print(PrintWriter.java:576)
at java.io.PrintWriter.println(PrintWriter.java:712)
at java.lang.Throwable.printStackTrace(Throwable.java:529)
at com.google.appengine.tools.appstats.Recorder.createStackTrace(Recorder.java:160)
at com.google.appengine.tools.appstats.Recorder.initializeIntermediary(Recorder.java:271)
at com.google.appengine.tools.appstats.Recorder.makeAsyncCall(Recorder.java:290)
at com.googlecode.objectify.cache.TriggerFutureHook.makeAsyncCall(TriggerFutureHook.java:144)
at com.google.apphosting.api.ApiProxy.makeAsyncCall(ApiProxy.java:184)
对于谷歌工程师，这里的a link这些错误
我怀疑这是导致appstats炸弹的堆栈跟踪。 Appstats是一种片状。你绝对可以关闭你不需要它的任何网址，但是你不能截断它的日志输出。 –
@RickMangi我已经更新了我的问题以包含OutOfMemoryError的堆栈跟踪（这是由printStackTrace引起的：D – ZiglioUK
是的，我已经在代码中看到堆栈跟踪，但我认为这是一个症状，而不是根本原因但是我可能是错误的，如果你在记忆体的细冰上滑行，一个大的内存缓存或者一个大的缓冲区写入（像这样）通常会把你推到边缘 –