https://bz.apache.org/bugzilla/show_bug.cgi?id=64080
Bug ID: 64080
Summary: Graceful shutdown does not occur for connected clients
that have not yet submitted their request payload
Product: Tomcat 9
Version: 9.0.27
Hardware: PC
Status: NEW
Severity: normal
Priority: P2
Component: Catalina
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: -----
Continuing from bug 62515, testing shows that graceful shutdown will occur if:
- the request has reached the servlet
- bindOnInit is set to false on Connector in server.xml
- unloadDelay is set to sufficient high value on Context in context.xml
The key point here is "the request has reached the servlet".
The server will accept a connect SYN/ACK and still terminate the connection,
resulting in error upstream.
Expected behavior for Tomcat here would be to:
1. Either not accept the connect (as it is shutting down)
Or
2. If accepted, wait unloadDelay/some_other_property period of time to receive
the request and respond to it.
To reproduce the error:
SERVER
- servlet with sleep of 30s
- unloadDelay set to 60s
- bindOnInit set to false
Testcase:
1. Use HTTPUrlConnection
urlConn.setDoInput (true);
urlConn.setDoOutput (true);
urlConn.setUseCaches (false);
urlConn.setConnectTimeout(1000); //1 second
urlConn.setReadTimeout(10000); // 10 seconds
urlConn.connect();
At this point a succesful connection to Tomcat server has been established by
the Java Client
2. Shutdown Tomcat server
Tomcat will abort this connection
3. Submit request:
OutputStreamWriter printout = new OutputStreamWriter(urlConn.getOutputStream
(), charset);
This will throw a IOException (SocketTimeOutException)
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