RFR: 8263743: redundant lock in SSLSocketImpl

[Xue-Lei Andrew Fan]

On Wed, 17 Mar 2021 17:23:03 GMT, Xue-Lei Andrew Fan <xuelei at openjdk.org> wrote:

> Remove redundant lock in SSLSocketImpl.
> 
> In the SSLSocketImpl, there is a socket level lock while reading application data (see readApplicationRecord). 
> 
>                 socketLock.lock(); 
>                 try { 
>                     plainText = decode(buffer); 
>                 } finally { 
>                     socketLock.unlock(); 
>                 } 
> If an application data read is in progress, other calling to SSLSocket APIs (for example getUseClientMode() in a handshake complete listener) could be blocked if socket level locks are used. 
> 
> No new regression test.  Simple fix, hard to trigger the deadlock.

ping ...

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PR: https://git.openjdk.java.net/jdk/pull/3053