Page Information

Title:	LCK09-J. Do not perform operations that can block while holding a lock
Author:	Ryan Hofler	Mar 29, 2009
Last Changed by:	David Svoboda	Aug 06, 2025
Tiny Link: (useful for email)	https://wiki.sei.cmu.edu/confluence/x/YTdGBQ
Export As:	Word · PDF

SEI CERT Oracle Coding Standard for Java (1)     Page: LCK00-J. Use private final lock objects to synchronize classes that may interact with untrusted code

Parent Page     Page: Rule 09. Locking (LCK)

• lck
• android-applicable
• dos-cc
• rule
• analyzable

Time	Editor
Aug 06, 2025 16:44	Amy Gale	View Changes
REM cost reform
Mar 10, 2025 21:46	Amy Gale	View Changes
Localize CodeSonar crossreferences to Java scope
Mar 05, 2025 11:46	Jill Britton	View Changes
Feb 14, 2025 15:51	David Svoboda	View Changes
Aug 06, 2021 09:04	Jon O'Donnell

External Links (10)
    https://wiki.sei.cmu.edu/confluence/display/java/PVS-Studio
    www.rgoarchitects.com/Files/fallacies.pdf
    https://wiki.sei.cmu.edu/confluence/pages/viewpage.action?p…
    oreilly.com/catalog/javarmi/chapter/ch10.html
    docs.oracle.com/javase/specs/jls/se8/html/jls-17.html
    https://pvs-studio.com/en/docs/warnings/v6095/
    https://wiki.sei.cmu.edu/confluence/pages/viewpage.action?p…
    https://wiki.sei.cmu.edu/confluence/pages/viewpage.action?p…
    https://docs.oracle.com/javase/8/docs/api/java/lang/Object.…
    https://www.sonarsource.com/products/codeanalyzers/sonarjav…

SEI CERT C Coding Standard (2)     Page: CON05-C. Do not perform operations that can block while holding a lock     Home page: SEI CERT C Coding Standard

SEI CERT Oracle Coding Standard for Java (18)     Page: CodeSonar     Page: ThreadSafe_V     Page: Parasoft_V     Page: Rule AA. References     Page: Klocwork_V     Page: THI04-J. Ensure that threads performing blocking operations can be terminated     Page: PVS-Studio_V     Page: Parasoft     Page: CodeSonar_V     Page: SonarQube     Page: THI03-J. Always invoke wait() and await() methods inside a loop     Page: SonarQube_V     Page: Klocwork     Page: ThreadSafe     Home page: SEI CERT Oracle Coding Standard for Java     Page: THI02-J. Notify all waiting threads rather than a single thread     Page: Rule BB. Glossary     Page: LCK07-J. Avoid deadlock by requesting and releasing locks in the same order