https://bz.apache.org/bugzilla/show_bug.cgi?id=63182
Bug ID: 63182
Summary: Servlet 3.1 ReadListener got exception(sometime) when
invoking servletinputstream.read method, after isReady
returns true.
Product: Tomcat 8
Version: 8.5.38
Hardware: PC
Status: NEW
Severity: normal
Priority: P2
Component: Catalina
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ----
using the following code can reproduce the error, with large size post request.
ServletInputStream in = req.getInputStream();
in.setReadListener(new ReadListener() {
@Override
public void onError(Throwable t) {
System.out.println("error: " + t);
d.resolve(null);
}
int count = 0;
@Override
public void onDataAvailable() throws
IOException {
System.out.println("onDataAvailable");
int c = in.read(new byte[1024]);
System.out.println("read: " + c);
if (c > 0) {
count += c;
System.out.println("\t\t\t\ttotal: " + MessageFormat.format("{0,number,#,##0}",
count));
}
boolean ready = in.isReady();
System.out.println("ready after: " +
ready);
if (ready) {
onDataAvailable();
}
}
@Override
public void onAllDataRead() throws IOException
{
System.out.println("all read");
d.resolve(null);
}
});
Console output sample:
...
...
ready after: true
onDataAvailable
read: 1024
total: 21,050,368
ready after: true
onDataAvailable
read: 1024
2019-02-16 23:27:09,654 ERROR com.webclient.web.LoginForm$3$1.run:444 -
java.lang.IllegalStateException: In non-blocking mode you may not read from the
ServletInputStream until the previous read has completed and isReady() returns
true
java.lang.IllegalStateException: In non-blocking mode you may not read from the
ServletInputStream until the previous read has completed and isReady() returns
true
at
org.apache.catalina.connector.CoyoteInputStream.checkNonBlockingRead(CoyoteInputStream.java:287)
at
org.apache.catalina.connector.CoyoteInputStream.read(CoyoteInputStream.java:128)
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