Assertion `memcached_failed(rc)' failed

[christopheg]

Hi,

We come across a strange list of error messages:

Nov 21 15:41:47 job0.myapplication.net application_service[2627697]: account_import (15242218): ./src/libmemcached/storage.cc:257: memcached_return_t memcached_send_ascii(Memcached*, memcached_instance_st*, const char*, size_t, const char*, size_t, time_t, uint32_t, uint64_t, bool, bool, memcached_storage_action_t): Assertion `memcached_failed(rc)' failed.
Dec 02 18:12:05 job0.myapplication.net application_service[1667523]: account_import (15860032): ./src/libmemcached/storage.cc:257: memcached_return_t memcached_send_ascii(Memcached*, memcached_instance_st*, const char*, size_t, const char*, size_t, time_t, uint32_t, uint64_t, bool, bool, memcached_storage_action_t): Assertion `memcached_failed(rc)' failed.
Dec 03 11:37:50 job0.myapplication.net application_service[1885508]: order_execute (15912452): ./src/libmemcached/storage.cc:257: memcached_return_t memcached_send_ascii(Memcached*, memcached_instance_st*, const char*, size_t, const char*, size_t, time_t, uint32_t, uint64_t, bool, bool, memcached_storage_action_t): Assertion `memcached_failed(rc)' failed.
Dec 03 13:14:59 job0.myapplication.net application_service[1924822]: order_execute (15944444): ./src/libmemcached/storage.cc:257: memcached_return_t memcached_send_ascii(Memcached*, memcached_instance_st*, const char*, size_t, const char*, size_t, time_t, uint32_t, uint64_t, bool, bool, memcached_storage_action_t): Assertion `memcached_failed(rc)' failed.
Dec 03 14:44:02 job0.myapplication.net application_service[1958669]: order_execute (15971006): ./src/libmemcached/storage.cc:257: memcached_return_t memcached_send_ascii(Memcached*, memcached_instance_st*, const char*, size_t, const char*, size_t, time_t, uint32_t, uint64_t, bool, bool, memcached_storage_action_t): Assertion `memcached_failed(rc)' failed.
Dec 03 18:12:40 job0.myapplication.net application_service[2037836]: order_execute (16030452): ./src/libmemcached/storage.cc:257: memcached_return_t memcached_send_ascii(Memcached*, memcached_instance_st*, const char*, size_t, const char*, size_t, time_t, uint32_t, uint64_t, bool, bool, memcached_storage_action_t): Assertion `memcached_failed(rc)' failed.

We use the following versions:

ii  libmemcached11:amd64                  1.1.4-1                           amd64        C and C++ client library to the memcached server
ii  php8.2-memcached                      3.2.0+2.2.0-4                     amd64        memcached extension module for PHP, uses libmemcached

From my understanding, the problem might be caused by a bug in libmemcached. I have created an issue there also:
awesomized/libmemcached#156

Does someone has an idea what could be wrong here?