https://bz.apache.org/bugzilla/show_bug.cgi?id=59904
Bug ID: 59904
Summary: memery leak--ServerCookie
Product: Tomcat 8
Version: 8.0.23
Hardware: PC
OS: Mac OS X 10.1
Status: NEW
Severity: normal
Priority: P2
Component: Catalina
Assignee: [email protected]
Reporter: [email protected]
heap dump:
Class Name Objects Shallow Heap Retained Heap
org.apache.tomcat.util.buf.ByteChunk 13220789 634597872 >=643312600
org.apache.tomcat.util.buf.MessageBytes 13194914 633355872 >=1801383536
org.apache.tomcat.util.buf.CharChunk 13204864 528194560 >=569456560
org.apache.tomcat.util.http.ServerCookie 2579614 123821472 >=1879787624
million+ ServerCookie objects in the heap,it cause memery leak.
org.apache.coyote.Request objcet contain a ServerCookies,it is a ServerCookie
array,and the array length is 2048.
so i have a test
GetMethod getMethod = new GetMethod("http://127.0.0.1:8080/";);
Header h = new Header();
h.setName("Cookie");
StringBuilder sb=new StringBuilder();
for(int i=0;i<2000;i++){
sb.append("a=b;");
}
h.setValue(sb.toString());
getMethod.addRequestHeader(h);
int statusCode = httpClient.executeMethod(getMethod);
debug and get two thousand cookies in the request,and ServerCookie arrays is
cached in heap.
we hava maxHeaderCount and maxHttpHeaderSize,but Cookie just as one header
so we need maxCookieCount too.
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