Hi Matan, Thank you for providing these additional details.
However, could you confirm if in your system you are also performing other OfflineUserDataJobService requests that are also making changes to the same userlist resource? I asked because this type of simultaneous requests are the common cause of the CONCURRENT_MODIFICATION error that you are encountering. Since you have logging enabled, could you collect all the logs generated during the same time these set of logs were generated so we can check whether there are other instances that are making changes to the same resource? You may send over the complete logs without the masked details using the Reply privately to author option. If this option is not available, you may send the details directly to our googleadsapi-supp...@google.com alias instead. Best regards, Peter Laurence Napa Oliquino Google Ads API Team ref:_00D1U1174p._5004Q2UjHZN:ref -- -- =~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~ Also find us on our blog: https://googleadsdeveloper.blogspot.com/ =~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~ You received this message because you are subscribed to the Google Groups "AdWords API and Google Ads API Forum" group. To post to this group, send email to adwords-api@googlegroups.com To unsubscribe from this group, send email to adwords-api+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/adwords-api?hl=en --- You received this message because you are subscribed to the Google Groups "Google Ads API and AdWords API Forum" group. To unsubscribe from this group and stop receiving emails from it, send an email to adwords-api+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/adwords-api/Hp1mS000000000000000000000000000000000000000000000R679PX00Yw8TMx7GTJ2Bh1AXz2x8ow%40sfdc.net.