Fix segmentation fault during the destruction of ConsumerImpl #121
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### Motivation When I ran the tests of Python wrapper in my local env, I observed a segmentation fault. See the key stacktrace: ``` #3 0x00007ffff6d742c5 in std::unique_lock<std::mutex>::lock() () from /usr/local/lib/python3.8/dist-packages/_pulsar.cpython-38-x86_64-linux-gnu.so #4 0x00007ffff6d72523 in std::unique_lock<std::mutex>::unique_lock(std::mutex&) () from /usr/local/lib/python3.8/dist-packages/_pulsar.cpython-38-x86_64-linux-gnu.so #5 0x00007ffff67de193 in pulsar::ClientImpl::newRequestId (this=0x0) at /home/xyz/github.com/apache/pulsar-client-cpp/lib/ClientImpl.cc:644 #6 0x00007ffff685d2c2 in pulsar::ConsumerImpl::~ConsumerImpl (this=0x7fff9800f9e0, __in_chrg=<optimized out>) at /home/xyz/github.com/apache/pulsar-client-cpp/lib/ConsumerImpl.cc:116 ``` In the destructor of `ConsumerImpl`, `client->newRequestId` might be called. However, `client` might be a null pointer because it's returned by `std::weak_ptr::lock()`. ### Modifications Add null check to avoid the segfault.
BewareMyPower
requested review from
RobertIndie,
Demogorgon314,
merlimat and
tisonkun
|
@RobertIndie PTAL first since you are the release manager of 3.1.0. I will depend on C++ client 3.1.0 on Python client. It's hard to reproduce because there is still something wrong with the Python client in my local env and I'm not sure why the current branch cannot expose this bug. |
BewareMyPower
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Nov 22, 2022
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shibd
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RobertIndie
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### Motivation When I ran the tests of Python wrapper in my local env, I observed a segmentation fault. See the key stacktrace: ``` #3 0x00007ffff6d742c5 in std::unique_lock<std::mutex>::lock() () from /usr/local/lib/python3.8/dist-packages/_pulsar.cpython-38-x86_64-linux-gnu.so #4 0x00007ffff6d72523 in std::unique_lock<std::mutex>::unique_lock(std::mutex&) () from /usr/local/lib/python3.8/dist-packages/_pulsar.cpython-38-x86_64-linux-gnu.so #5 0x00007ffff67de193 in pulsar::ClientImpl::newRequestId (this=0x0) at /home/xyz/github.com/apache/pulsar-client-cpp/lib/ClientImpl.cc:644 #6 0x00007ffff685d2c2 in pulsar::ConsumerImpl::~ConsumerImpl (this=0x7fff9800f9e0, __in_chrg=<optimized out>) at /home/xyz/github.com/apache/pulsar-client-cpp/lib/ConsumerImpl.cc:116 ``` In the destructor of `ConsumerImpl`, `client->newRequestId` might be called. However, `client` might be a null pointer because it's returned by `std::weak_ptr::lock()`. ### Modifications Add null check to avoid the segfault.
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Motivation
When I ran the tests of Python wrapper in my local env, I observed a segmentation fault. See the key stacktrace:
In the destructor of
ConsumerImpl,client->newRequestIdmight be called. However,clientmight be a null pointer because it's returned bystd::weak_ptr::lock().Modifications
Add null check to avoid the segfault.