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"Unable to synchronize with the Suspected Object Lists..." error is encountered when trying to synchronize Suspicious Object (SO) from the Apex One server to Apex Central

    • Updated:
    • 24 Aug 2020
    • Product/Version:
    • Apex Central 2019
    • Apex One 2019
    • Platform:
Summary

When trying to synchronize Suspicious Object from the Apex One Server, the following error can be seen:

SO sync error

Unable to synchronize with the Suspected Object Lists. Type a valid server or address, or check the connection and proxy settings and try again. If the problem persists, contact technical support.

From the CCCADump.log (from Apex One Server), it shows the following error:

?Unrecognized content encoding type. libcurl understands identity content encodings.
Closing connection 0
TLSv1.2 (OUT), TLS alert, close notify (256):

This issue is caused by an error on the 3rd-party library used to send HTTP requests. If the data compression is enabled on Apex Central, the compressed SO URLs cannot be decompressed and parsed to the database.

Details
Public

To fix this issue, disable the dynamic content compression feature on the Apex Central server’s IIS. Follow the steps below:

  1. From the Apex Central server, open IIS Manager.
  2. On the left pane, expand Sites, and then expand Default Web Site.
  3. Click on WebApp, and double-click on Compression.

    IIs Manager

  4. Remove the tick mark for Enable dynamic content compression. This will disable the dynamic compression for this site (Apex Central).

    Compression

  5. Click the Apply button, under the Actions pane on the right side, to disable the dynamic compression immediately.
  6. Test the SO List sync in Apex One Web console again.
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Category:
Troubleshoot
Solution Id:
000264545
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