Table view - #14
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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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### Motivation We observed server null `ClientConnection` accesses in test environment. See the `this=0x0` outputs in the following two typical stacks. ``` #8 bytesWritten (this=0xb8, size=371) at lib/SharedBuffer.h:166 #9 pulsar::ClientConnection::handleRead (this=0x0, err=..., bytesTransferred=371, minReadSize=4) at lib/ClientConnection.cc:609 ``` ``` #12 0x00007f33202933d2 in unique_lock (__m=..., this=0x7f3311c82800) at /opt/rh/devtoolset-7/root/usr/include/c++/7/bits/std_mutex.h:197 #13 pulsar::ClientConnection::sendPendingCommands (this=0x0) at lib/ClientConnection.cc:1071 #14 0x00007f3320293d2d in pulsar::ClientConnection::handleSendPair (this=0x0, err=...) at lib/ClientConnection.cc:1066 ``` Though `shared_from_this()` is always passed to the `std::bind` function, when the method of `ClientConnection` is called, the pointer is still `null`. ### Modifications First, replace all `std::bind` calls with the lambda expression that catches `std::weak_ptr<ClientConnection>` and perform null checks explicitly on the value returned by the `lock()` method. Since now all asio callbacks don't hold a `shared_ptr`, the owner of the `ClientConnection` object should be `ConnectionPool`, i.e. the pool maintains some connections, while all asio callbacks use `weak_ptr` to test if the connection is present. Second, make `ClientConnection::getConnection` return `shared_ptr` rather than `weak_ptr` so that the caller side does not need to check if `lock()` returns null in the callback of this future. We cannot make `ConnectionPool::getConnectionAsync` return `shared_ptr` because it could return the future of `connectPromise_`, which is hold by `ClientConnection` itself. We should avoid holding a `shared_ptr` of `ClientConnection` because its owner is `ConnectionPool`.
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Master Issue: #
Motivation
#,
Modifications
When the reader call
getLastMessageId, IflastMessageidof the reader is batch and batch size is 1, the broker does not return this batchSize, causingbatchSizeto equal the default value(0). This will cause the validation to fail.(batchIndex = 0, batchSize = 0).
https://github.com/apache/pulsar-client-cpp/blob/44f3b5240732a035395ec34b977301435dd0ec71/lib/MessageIdBuilder.cc#L45
Fix: Allow
batchSize == batchIndex() before the pulsar broker fixes it.Reader support readeNextAsync interface.
Support for TableView for the non-partition topic.
NOTE: Since
Readerdoes not support the partitioned topic, I will open a new PR to support it and test TableView under the partition topic.Verifying this change
This change added tests and can be verified as follows:
ReaderTest.testSimpleReaderunit test to cover [Modifications][1]ReaderTest.testAsyncReadunit test to cover [Modifications][2]TableViewTestunit test to cover [Modifications][3]Documentation
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