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there's nothing in the memcached intregation which has been changed since long time.
I wonder, maybe you are running into specific limits like DD_TRACE_SPANS_LIMIT?
I'd suggest you write a ticket to the DataDog support, so that we can also see the received data for ourselves / have some of our support engineers verify the issue.
Sorry for the delay - just getting back to this. Here is the DD ticket# - 1095183.
For additional information, we ran 0.72 for a couple weeks and memcache reporting in DD stayed constant. We deployed 0.83 and GETs disappeared from DD UI pretty quick.
This bug has been fixed as of the freshly released 0.85.0. This was due to the JIT not calling zend_execute_internal, our internal hook to trace internal functions.
Bug description
Traces of Memcache GETs disappear from DD UI sometime between 0.72 and 0.80 - 0.72 works. Still not working in 0.83.
GET's are reported for about 20 min after a deploy and then stop. SET's continue to be reported.
PHP version
8.0.x (latest)
Tracer version
0.72 works - 0.76 does not - possibly more in between 0.72 and 0.76 don't work
Installed extensions
memcached 3.2.0
OS info
4.14.301-224.520.amzn2.x86_64
Diagnostics and configuration
Output of phpinfo() (ddtrace >= 0.47.0)
{ "date": "2023-01-17T23:01:49Z", "os_name": "Linux 269731679e46 4.14.301-224.520.amzn2.x86_64 #1 SMP Fri Dec 9 09:57:03 UTC 2022 x86_64", "os_version": "4.14.301-224.520.amzn2.x86_64", "version": "0.83.0", "lang": "php", "lang_version": "8.0.21", "env": "qa-r2d2", "enabled": true, "service": "php", "enabled_cli": false, "agent_url": "http://172.17.0.1:8126", "debug": false, "analytics_enabled": false, "sample_rate": 1, "sampling_rules": [], "tags": [], "service_mapping": [], "distributed_tracing_enabled": true, "priority_sampling_enabled": true, "dd_version": "23.2.1.10", "architecture": "x86_64", "sapi": "apache2handler", "datadog.trace.request_init_hook": "/opt/datadog/dd-library/0.83.0/dd-trace-sources/bridge/dd_wrap_autoloader.php", "open_basedir_configured": false, "uri_fragment_regex": null, "uri_mapping_incoming": null, "uri_mapping_outgoing": null, "auto_flush_enabled": false, "generate_root_span": true, "http_client_split_by_domain": true, "measure_compile_time": true, "report_hostname_on_root_span": false, "traced_internal_functions": null, "auto_prepend_file_configured": false, "integrations_disabled": "default", "enabled_from_env": true, "opcache.file_cache": null }-name>.php` when you are done -->
Upgrading info
Noticed in 0.79 - did not have time to try every version after 0.72
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