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Posted to notifications@skywalking.apache.org by "caiyi3857200 (via GitHub)" <gi...@apache.org> on 2025/03/25 03:51:32 UTC
[I] [Bug] PHP 8.0.26 with skywalking_agent unexpectedly removes socket file causing reporting failures [skywalking]
caiyi3857200 opened a new issue, #13139:
URL: https://github.com/apache/skywalking/issues/13139
### Search before asking
- [x] I had searched in the [issues](https://github.com/apache/skywalking/issues?q=is%3Aissue) and found no similar issues.
### Apache SkyWalking Component
PHP (apache/skywalking-php)
### What happened
The skywalking_agent extension automatically deletes its Unix socket file shortly after initialization, resulting in subsequent reporting errors:
2025-03-25T02:21:23.147083Z INFO: Remove socket file "/tmp/skywalking-agent/631216082cef2.sock"
2025-03-25T02:22:34.186745Z ERROR: Channel send failed - No such file or directory (os error 2)
Key Observations:
The socket file is created and then immediately removed by the agent's shutdown hook
This behavior occurs with both:
skywalking_agent 0.8.0 (Kafka reporter)
skywalking_agent 0.7.0 (gRPC reporter)
Works correctly in PHP 7.4.33 environments
New issue specific to PHP 8.0.26
Both gRPC and Kafka reporters exhibit the same error
The same setup (PHP 7.4.33 + skywalking_agent 0.7.0) has been working normally for over 1 year in other projects
The issue appears specifically with PHP 8.0+ requirements in new projects
### What you expected to happen
Preventing premature shutdown in PHP 8.0's execution model
Alternative IPC approaches that survive PHP 8's lifecycle changes
Required patches for PHP 8 compatibility
### How to reproduce
Environment:
OS: CentOS 8
PHP: 8.0.26
PHP Extensions Installed: bcmath, Core, ctype, curl, date, dom, filter, ftp, gd, gettext, grpc, hash, iconv, igbinary, intl, json, libxml, mbstring, mysqli, mysqlnd, openssl, pcntl, pcre, PDO, pdo_mysql, pdo_sqlite, Phar, posix, protobuf, rdkafka, redis, Reflection, session, shmop, SimpleXML, skywalking_agent, soap, sockets, sodium, SPL, sqlite3, standard, sysvsem, tokenizer, xml, xmlreader, xmlwriter, zip, zlib
System Dependencies:
GCC: 8.5.0 (Red Hat 8.5.0-4)
LLVM: 12.0.1
Clang: 12.0.1 (Red Hat 12.0.1-4.module_el8.5.0+1025+93159d6c)
Installation Method: PECL
With skywalking_agent 0.8.0:
skywalking_agent
version => 1.0.0-dev
authors => Apache Software Foundation:jmjoy <jm...@apache.org>:Yanlong He <he...@apache.org>
Directive => Local Value => Master Value
skywalking_agent.enable => 1 => 1
skywalking_agent.skywalking_version => 9 => 9
skywalking_agent.server_addr => 127.0.0.1:11800 => 127.0.0.1:11800
skywalking_agent.instance_name => no value => no value
skywalking_agent.service_name => dcm_shop_system_prod => dcm_shop_system_prod
skywalking_agent.worker_threads => 0 => 0
skywalking_agent.log_level => DEBUG => DEBUG
skywalking_agent.log_file => /tmp/skywalking-agent.log => /tmp/skywalking-agent.log
skywalking_agent.runtime_dir => /tmp/skywalking-agent => /tmp/skywalking-agent
skywalking_agent.authentication => no value => no value
skywalking_agent.enable_tls => 0 => 0
skywalking_agent.ssl_trusted_ca_path => no value => no value
skywalking_agent.ssl_key_path => no value => no value
skywalking_agent.ssl_cert_chain_path => no value => no value
skywalking_agent.heartbeat_period => 30 => 30
skywalking_agent.properties_report_period_factor => 10 => 10
skywalking_agent.enable_zend_observer => 0 => 0
skywalking_agent.reporter_type => kafka => kafka
skywalking_agent.kafka_bootstrap_servers => 172.16.54.73:9092 => 172.16.54.73:9092
skywalking_agent.kafka_producer_config => {} => {}
skywalking_agent.inject_context => 0 => 0
skywalking_agent.standalone_socket_path => no value => no value
skywalking_agent.psr_logging_level => no value => no value
Error Log:
2025-03-24T19:01:40.51969029+08:00 INFO: Remove socket file socket_file="/tmp/skywalking-agent/63114875ecb9e.sock"
2025-03-24T19:03:48.724125628+08:00 ERROR: channel send failed err=No such file or directory (os error 2)
With skywalking_agent 0.7.0:
skywalking_agent
version => 0.7.0
authors => Apache Software Foundation:jmjoy <jm...@apache.org>:Yanlong He <he...@apache.org>
Directive => Local Value => Master Value
skywalking_agent.enable => 1 => 1
skywalking_agent.skywalking_version => 9 => 9
skywalking_agent.server_addr => 172.16.53.42:11800 => 172.16.53.42:11800
skywalking_agent.service_name => dcm_shop_system_prod => dcm_shop_system_prod
skywalking_agent.worker_threads => 0 => 0
skywalking_agent.log_level => DEBUG => DEBUG
skywalking_agent.log_file => /tmp/skywalking-agent.log => /tmp/skywalking-agent.log
skywalking_agent.runtime_dir => /tmp/skywalking-agent => /tmp/skywalking-agent
skywalking_agent.authentication => no value => no value
skywalking_agent.enable_tls => 0 => 0
skywalking_agent.ssl_trusted_ca_path => no value => no value
skywalking_agent.ssl_key_path => no value => no value
skywalking_agent.ssl_cert_chain_path => no value => no value
skywalking_agent.heartbeat_period => 30 => 30
skywalking_agent.properties_report_period_factor => 10 => 10
skywalking_agent.enable_zend_observer => 0 => 0
skywalking_agent.reporter_type => grpc => grpc
skywalking_agent.kafka_bootstrap_servers => no value => no value
skywalking_agent.kafka_producer_config => {} => {}
2025-03-25T02:21:23.147083Z INFO: Remove socket file socket_file="/tmp/skywalking-agent/631216082cef2.sock"
2025-03-25T02:22:34.186745Z ERROR: channel send failed err=No such file or directory (os error 2)
### Anything else
Please help investigate:
Why the agent's shutdown hook triggers prematurely in PHP 8.0
How to maintain persistent socket connection in PHP 8 environments
### Are you willing to submit a pull request to fix on your own?
- [ ] Yes I am willing to submit a pull request on my own!
### Code of Conduct
- [x] I agree to follow this project's [Code of Conduct](https://www.apache.org/foundation/policies/conduct)
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Re: [I] [Bug] PHP 8.0.26 with skywalking_agent unexpectedly removes socket file causing reporting failures [skywalking]
Posted by "wu-sheng (via GitHub)" <gi...@apache.org>.
wu-sheng closed issue #13139: [Bug] PHP 8.0.26 with skywalking_agent unexpectedly removes socket file causing reporting failures
URL: https://github.com/apache/skywalking/issues/13139
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Re: [I] [Bug] PHP 8.0.26 with skywalking_agent unexpectedly removes socket file causing reporting failures [skywalking]
Posted by "caiyi3857200 (via GitHub)" <gi...@apache.org>.
caiyi3857200 commented on issue #13139:
URL: https://github.com/apache/skywalking/issues/13139#issuecomment-2750050584
> 如果您使用 php-fpm 守护进程模式，请参阅[https://skywalking.apache.org/docs/skywalking-php/next/en/setup/service-agent/php-agent/readme/#configure 。](https://skywalking.apache.org/docs/skywalking-php/next/en/setup/service-agent/php-agent/readme/#configure)
Thank you. After looking at the original available environment, php-fpm -F is indeed used. In the afternoon, I will debug the configuration in the document
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Re: [I] [Bug] PHP 8.0.26 with skywalking_agent unexpectedly removes socket file causing reporting failures [skywalking]
Posted by "jmjoy (via GitHub)" <gi...@apache.org>.
jmjoy commented on issue #13139:
URL: https://github.com/apache/skywalking/issues/13139#issuecomment-2750037562
Please refer to <https://skywalking.apache.org/docs/skywalking-php/next/en/setup/service-agent/php-agent/readme/#configure> if you are using php-fpm daemon mode.
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