External Redirect vulnerability check failed forpaarmeter due to an I/O error

[Antonio AE]

Hello, good morning,

  I am currently doing some active scans on an internal URL with no success: after several hours running the active scan I get this message:

19825663 [ZAP-ActiveScanner-1] WARN  org.zaproxy.zap.extension.ascanrules.ExternalRedirectScanRule - External Redirect vulnerability check failed for parameter [iNumPage]and payload [4100518615406984558.owasp.org] due to an I/O error
java.net.SocketTimeoutException: Read timed out
        at java.net.SocketInputStream.socketRead0(Native Method) ~[?:1.8.0_302]
        at java.net.SocketInputStream.socketRead(SocketInputStream.java:116) ~[?:1.8.0_302]
        at java.net.SocketInputStream.read(SocketInputStream.java:171) ~[?:1.8.0_302]
        at java.net.SocketInputStream.read(SocketInputStream.java:141) ~[?:1.8.0_302]
        at sun.security.ssl.SSLSocketInputRecord.read(SSLSocketInputRecord.java:464) ~[?:1.8.0_302]

.....

  I don't know how to interpret this message, I mean, I don't know what could be the reasons for it, has something similar happened to someone (and how did you solve it)?

  Thank all of you in advance and best regards,

    Antonio

[thc...@gmail.com]

Hi.

Is the target responsive when that happens? Could be that the target is
under heavy load and not able to answer in time.

Best regards.

[Antonio AE]

Hello,

  Honestly, I think yes, but I don't know because I run the active scan at night and I see the results in the morning. It's true that we have to re-start de app because it is not available/responsive but I have not verifed the system just when the error happens.

  Thank you very mucu for your answer, I will try and notice you up.

  Regards,

     Antonio