Applying a lock over a call to a method performing network transactions can be problematic. Depending on the speed and reliability of the connection, the synchronization could lock up the program, producing temporary or permanent deadlock.
Noncompliant Code Example
This noncompliant code example involves the method send_page which sends a Page object containing information being passed between a client and server. send_packet is synchronized to protect access to the array page_buff.
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Calling writeObject within the synchronized send_page could lead to deadlock in the event that the connection becomes slow or acknowledgments of received data are delayed or lost.
Compliant Solution
A solution would be to separate actions into steps:
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