Close rpc channel if MilvusClient fails to initialize

[yhmo]

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This pull-request has been approved by: yhmo

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[gemini-code-assist]

Summary of Changes

Hello @yhmo, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request enhances the robustness of the Milvus Java SDK by addressing a potential resource leakage scenario. Previously, if the client failed to establish a connection or initialize its RPC stubs, the gRPC channel might remain open indefinitely. The changes introduce comprehensive error handling during these critical setup phases, guaranteeing that the channel is properly shut down in the event of any initialization failure, thus improving resource management and application stability.

Highlights

• Resource Leak Prevention: Introduced try-catch blocks during the client initialization process for both MilvusServiceClient and MilvusClientV2.
• Channel Closure on Failure: Ensured that the underlying gRPC channel is explicitly closed if an exception occurs during the client's connection or initialization, preventing resource leaks.

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[gemini-code-assist]

Code Review

This pull request introduces a crucial improvement by ensuring that the RPC channel is closed if the Milvus client fails to initialize. This is achieved by wrapping the connection logic in try-catch blocks in both MilvusServiceClient and MilvusClientV2, preventing potential resource leaks. The changes are correct and well-targeted. I have a couple of suggestions to further improve the code's robustness and readability regarding exception handling and the use of magic numbers.