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BewareMyPower
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Jan 5, 2023
Fixes apache#167 ### Motivation Here are some debugging info when the segfault happened in `testCloseClient`. The outputs have been trimmed to make them clear. An example crash at `async_write`: ``` #12 0x00007ffff7496dad in basic_stream_socket<...>::boost::asio::async_write /usr/include/boost/asio/impl/write.hpp:512 #13 0x00007ffff748e003 in ClientConnection::asyncWrite lib/ClientConnection.h:245 #14 0x00007ffff746e0b6 in ClientConnection::handleHandshake (this=0x555555e689d0) lib/ClientConnection.cc:502 ``` Another example crash at `async_receive`: ``` #6 0x00007ffff7497247 in basic_stream_socket<...>::async_receive /usr/include/boost/asio/basic_stream_socket.hpp:677 #7 0x00007ffff748e647 in ClientConnection::asyncReceive lib/ClientConnection.h:258 #8 0x00007ffff746fa5d in ClientConnection::readNextCommand lib/ClientConnection.cc:606 ``` The frame where it crashed: ``` 245 if (descriptor_data->shutdown_) (gdb) p descriptor_data $2 = (boost::asio::detail::epoll_reactor::per_descriptor_data &) @0x555555e4a780: 0x0 ``` We can see the socket descriptor is `nullptr`. The root cause is when `async_receive` or `async_write` is called, the `io_service` object might be closed. This case happened when `createProducerAsync` is called, the actual producer creation continues in another thread, while the `client.close()` happens in the current thread. ### Modifications Check if the `ClientConnection` is closed before `async_receive` or `async_write`. To avoid the use of lock, changing the `state_` field to atomic. ### Verifications ```bash ./tests/pulsar-tests --gtest_filter='ClientTest.testCloseClient' --gtest_repeat=20 ``` It never crashed after applying this patch.
BewareMyPower
added a commit
that referenced
this pull request
Jan 17, 2023
Fixes apache#167 ### Motivation Here are some debugging info when the segfault happened in `testCloseClient`. The outputs have been trimmed to make them clear. An example crash at `async_write`: ``` #12 0x00007ffff7496dad in basic_stream_socket<...>::boost::asio::async_write /usr/include/boost/asio/impl/write.hpp:512 #13 0x00007ffff748e003 in ClientConnection::asyncWrite lib/ClientConnection.h:245 #14 0x00007ffff746e0b6 in ClientConnection::handleHandshake (this=0x555555e689d0) lib/ClientConnection.cc:502 ``` Another example crash at `async_receive`: ``` #6 0x00007ffff7497247 in basic_stream_socket<...>::async_receive /usr/include/boost/asio/basic_stream_socket.hpp:677 #7 0x00007ffff748e647 in ClientConnection::asyncReceive lib/ClientConnection.h:258 #8 0x00007ffff746fa5d in ClientConnection::readNextCommand lib/ClientConnection.cc:606 ``` The frame where it crashed: ``` 245 if (descriptor_data->shutdown_) (gdb) p descriptor_data $2 = (boost::asio::detail::epoll_reactor::per_descriptor_data &) @0x555555e4a780: 0x0 ``` We can see the socket descriptor is `nullptr`. The root cause is when `async_receive` or `async_write` is called, the `io_service` object might be closed. This case happened when `createProducerAsync` is called, the actual producer creation continues in another thread, while the `client.close()` happens in the current thread. ### Modifications Check if the `ClientConnection` is closed before `async_receive` or `async_write`. To avoid the use of lock, changing the `state_` field to atomic. ### Verifications ```bash ./tests/pulsar-tests --gtest_filter='ClientTest.testCloseClient' --gtest_repeat=20 ``` It never crashed after applying this patch.
BewareMyPower
added a commit
that referenced
this pull request
Feb 7, 2023
Fixes apache#167 ### Motivation Here are some debugging info when the segfault happened in `testCloseClient`. The outputs have been trimmed to make them clear. An example crash at `async_write`: ``` #12 0x00007ffff7496dad in basic_stream_socket<...>::boost::asio::async_write /usr/include/boost/asio/impl/write.hpp:512 #13 0x00007ffff748e003 in ClientConnection::asyncWrite lib/ClientConnection.h:245 #14 0x00007ffff746e0b6 in ClientConnection::handleHandshake (this=0x555555e689d0) lib/ClientConnection.cc:502 ``` Another example crash at `async_receive`: ``` #6 0x00007ffff7497247 in basic_stream_socket<...>::async_receive /usr/include/boost/asio/basic_stream_socket.hpp:677 #7 0x00007ffff748e647 in ClientConnection::asyncReceive lib/ClientConnection.h:258 #8 0x00007ffff746fa5d in ClientConnection::readNextCommand lib/ClientConnection.cc:606 ``` The frame where it crashed: ``` 245 if (descriptor_data->shutdown_) (gdb) p descriptor_data $2 = (boost::asio::detail::epoll_reactor::per_descriptor_data &) @0x555555e4a780: 0x0 ``` We can see the socket descriptor is `nullptr`. The root cause is when `async_receive` or `async_write` is called, the `io_service` object might be closed. This case happened when `createProducerAsync` is called, the actual producer creation continues in another thread, while the `client.close()` happens in the current thread. ### Modifications Check if the `ClientConnection` is closed before `async_receive` or `async_write`. To avoid the use of lock, changing the `state_` field to atomic. ### Verifications ```bash ./tests/pulsar-tests --gtest_filter='ClientTest.testCloseClient' --gtest_repeat=20 ``` It never crashed after applying this patch.
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