Semi-private python API for overriding handle_undeliverable_message inside PythonActor #797
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…nside PythonActor (meta-pytorch#797) Summary: This diff makes undeliverable message handling overridable for python actors, using the newly introduced `Actor._handle_undeliverable_message` method. Previously, the rust implementation of `PythonActor` simply used the default `Actor::handle_undeliverable_message` implementation. Now, `PythonActor` overrides `handle_undeliverable_message` to call into the corresponding method on the underlying python class. Differential Revision: D79841379
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…nside PythonActor (meta-pytorch#797) Summary: This diff makes undeliverable message handling overridable for python actors, using the newly introduced `Actor._handle_undeliverable_message` method. Previously, the rust implementation of `PythonActor` simply used the default `Actor::handle_undeliverable_message` implementation. Now, `PythonActor` overrides `handle_undeliverable_message` to call into the corresponding method on the underlying python class. Differential Revision: D79841379
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…nside PythonActor (meta-pytorch#797) Summary: Pull Request resolved: meta-pytorch#797 This diff makes undeliverable message handling overridable for python actors, using the newly introduced `Actor._handle_undeliverable_message` method. Previously, the rust implementation of `PythonActor` simply used the default `Actor::handle_undeliverable_message` implementation. Now, `PythonActor` overrides `handle_undeliverable_message` to call into the corresponding method on the underlying python class. Differential Revision: D79841379
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…nside PythonActor (meta-pytorch#797) Summary: Pull Request resolved: meta-pytorch#797 This diff makes undeliverable message handling overridable for python actors, using the newly introduced `Actor._handle_undeliverable_message` method. Previously, the rust implementation of `PythonActor` simply used the default `Actor::handle_undeliverable_message` implementation. Now, `PythonActor` overrides `handle_undeliverable_message` to call into the corresponding method on the underlying python class. Differential Revision: D79841379
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…nside PythonActor (meta-pytorch#797) Summary: This diff makes undeliverable message handling overridable for python actors, using the newly introduced `Actor._handle_undeliverable_message` method. Previously, the rust implementation of `PythonActor` simply used the default `Actor::handle_undeliverable_message` implementation. Now, `PythonActor` overrides `handle_undeliverable_message` to call into the corresponding method on the underlying python class. Differential Revision: D79841379
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…nside PythonActor (meta-pytorch#797) Summary: This diff makes undeliverable message handling overridable for python actors, using the newly introduced `Actor._handle_undeliverable_message` method. Previously, the rust implementation of `PythonActor` simply used the default `Actor::handle_undeliverable_message` implementation. Now, `PythonActor` overrides `handle_undeliverable_message` to call into the corresponding method on the underlying python class. Differential Revision: D79841379
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…nside PythonActor (meta-pytorch#797) Summary: Pull Request resolved: meta-pytorch#797 This diff makes undeliverable message handling overridable for python actors, using the newly introduced `Actor._handle_undeliverable_message` method. Previously, the rust implementation of `PythonActor` simply used the default `Actor::handle_undeliverable_message` implementation. Now, `PythonActor` overrides `handle_undeliverable_message` to call into the corresponding method on the underlying python class. Differential Revision: D79841379
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…nside PythonActor (meta-pytorch#797) Summary: Pull Request resolved: meta-pytorch#797 This diff makes undeliverable message handling overridable for python actors, using the newly introduced `Actor._handle_undeliverable_message` method. Previously, the rust implementation of `PythonActor` simply used the default `Actor::handle_undeliverable_message` implementation. Now, `PythonActor` overrides `handle_undeliverable_message` to call into the corresponding method on the underlying python class. Differential Revision: D79841379
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Summary: The purpose of this diff is to handle the following scenario: 1. Process A starts serving a NetRx. 2. Process B creates a NetTx that connects to process A's NetRx. 3. B sends a few messages to A, and the messages are acked. 4. Process A dies/is killed, while B stays alive. 5. A new Process C starts serving a NetRx on the same channel as from step 1. 6. B's NetTx connects to C's NetRx, *with no way of knowing it has connected to a different process than before*. 7. B sends messages to C, starting from where it left off with A. 8. C rejects all of B's messages because of invalid sequence numbers. 9. B's NetTx eventually times out after a long time with no acks. In order to distinguish among connections from different NetTx instances to the same NetRx instance, each NetTx generates a random unique session id. This session id gets sent as part of an initial handshake from NetTx -> NetRx before the NetTx starts sending normal messages. Currently, though, NetTx doesn't wait for any handshake before starting to send messages. To resolve the issue described above, this diff introduces a global (per-process) "rx session id". When a NetTx first connects to a NetRx, the NetRx responds with its rx session id as part of the handshake. The NetTx waits for the handshake response and extracts the rx session id. If this is the first time the NetTx is connecting, the NetTx stores the rx session id. On subsequent connection attempts, the NetTx will validate the rx session id it receives from the handshake against the rx session id it previously stored; if there is a mismatch, the NetTx returns the appropriate error to its caller. Differential Revision: D79607092
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…nside PythonActor (meta-pytorch#797) Summary: This diff makes undeliverable message handling overridable for python actors, using the newly introduced `Actor._handle_undeliverable_message` method. Previously, the rust implementation of `PythonActor` simply used the default `Actor::handle_undeliverable_message` implementation. Now, `PythonActor` overrides `handle_undeliverable_message` to call into the corresponding method on the underlying python class. Differential Revision: D79841379
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…nside PythonActor (meta-pytorch#797) Summary: This diff makes undeliverable message handling overridable for python actors, using the newly introduced `Actor._handle_undeliverable_message` method. Previously, the rust implementation of `PythonActor` simply used the default `Actor::handle_undeliverable_message` implementation. Now, `PythonActor` overrides `handle_undeliverable_message` to call into the corresponding method on the underlying python class. Differential Revision: D79841379
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…nside PythonActor (meta-pytorch#797) Summary: Pull Request resolved: meta-pytorch#797 This diff makes undeliverable message handling overridable for python actors, using the newly introduced `Actor._handle_undeliverable_message` method. Previously, the rust implementation of `PythonActor` simply used the default `Actor::handle_undeliverable_message` implementation. Now, `PythonActor` overrides `handle_undeliverable_message` to call into the corresponding method on the underlying python class. Differential Revision: D79841379
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…nside PythonActor (meta-pytorch#797) Summary: Pull Request resolved: meta-pytorch#797 This diff makes undeliverable message handling overridable for python actors, using the newly introduced `Actor._handle_undeliverable_message` method. Previously, the rust implementation of `PythonActor` simply used the default `Actor::handle_undeliverable_message` implementation. Now, `PythonActor` overrides `handle_undeliverable_message` to call into the corresponding method on the underlying python class. Differential Revision: D79841379
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Summary: This diff makes undeliverable message handling overridable for python actors, using the newly introduced
Actor._handle_undeliverable_messagemethod. Previously, the rust implementation ofPythonActorsimply used the defaultActor::handle_undeliverable_messageimplementation. Now,PythonActoroverrideshandle_undeliverable_messageto call into the corresponding method on the underlying python class.Differential Revision: D79841379