Recently, we are currently upgrading our Integration Servers from webMethods 7.1.2 to 9.5.
As part of our testing, we observed that while doing a http post (from webM9.5) to Outbound URL, we are receiving response as 400 Bad Request but the same is working fine without any issue in webM7.1). We are getting this error intermettiently and not continuously.
After verifying patch fixes for webMethods 7.1.2, we found that PIE-19512 (IS_7.1.2_Core_Fix37) is available where the above error is resolved. As far as the fix, it mainly resolved the issue with combined length of username and password in the http request which is more thatn 56 characters. In our case, we are not using any user name and password while doing http post.
Regarding patches wise, we have latest patch fix installed on webM9.5, but still the issue is not resolved. Any pointers for resolving this issue will be of great help for us.