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Home/ Questions/Q 542369
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Editorial Team
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Editorial Team
Asked: May 13, 20262026-05-13T10:26:22+00:00 2026-05-13T10:26:22+00:00

When do we need single threded model in webapp while designing web application in

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When do we need single threded model in webapp while designing web application in java.

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  1. Editorial Team
    Editorial Team
    2026-05-13T10:26:22+00:00Added an answer on May 13, 2026 at 10:26 am

    The single-threaded model should almost always be avoided. (I’m assuming you’re talking about the SingleThreadModel interface.) Basically it was introduced in an attempt to save people from having to think about concurrency, but it was a bad idea. Concurrency is inherent in web applications – introducing a bottleneck like the single threaded model is the wrong solution. The right solution is to educate developers about concurrency better, and introduce better building blocks for handling it.

    The interface is deprecated as of the Java Servlet API 2.4, with this note:

    Note that SingleThreadModel does not
    solve all thread safety issues. For
    example, session attributes and static
    variables can still be accessed by
    multiple requests on multiple threads
    at the same time, even when
    SingleThreadModel servlets are used.
    It is recommended that a developer
    take other means to resolve those
    issues instead of implementing this
    interface, such as avoiding the usage
    of an instance variable or
    synchronizing the block of the code
    accessing those resources. This
    interface is deprecated in Servlet API
    version 2.4.

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