Say it like this
- We have a deadlock in the transaction.
- The system is deadlocked waiting for the lock.
- We need to resolve this deadlock before deploying.
Use it at work
Debugging
- The job hangs because of a deadlock between two transactions.
- Postgres logs show a deadlock on the orders table.
Fixing
- Always lock the tables in the same order to avoid deadlocks.
- Adding a timeout will break the deadlock.
In meetings
- The two teams are in a deadlock. We need a decision from leadership.
- We're deadlocked on the design.
Don't say this
Deadlock has a specific technical meaning involving mutual waiting for resources, not general slowness.
Don't mix it up
| Term | What it is | Who writes or uses it | When |
|---|---|---|---|
| deadlock | Two processes waiting for each other forever | Developers | Locks, threads |
| race condition | Result depends on timing of operations | Developers | Shared state |
Practice
Try it
4 quick exercises
1. Your team found two threads blocking each other. What do you say in a standup?
2. If Thread A holds Lock 1 and waits for Lock 2 while Thread B holds Lock 2 and waits for Lock 1, you have a _______.
3. Which sentence uses deadlock incorrectly?
4. Rewrite this in natural tech English: 'Two parts of the code are waiting for each other and nothing can continue.'
Say it out loud
Phrase 1 of 3
"We have a deadlock in the transaction."
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More about deadlock
Real examples(3)
- in a standup
"We discovered a deadlock in the payment service when two threads try to update the same account balance."
- in a code review
"This code could cause a deadlock because Thread A locks mutex X then waits for mutex Y, while Thread B does the opposite."
- in a team meeting
"The database deadlock last night affected order processing for about ten minutes before the retry logic kicked in."
More mistakes(2)
Handle with care. Deadlock specifically refers to a situation where two or more processes are blocked waiting for each other. Do not use it generically for any system freeze or delay.
- ✕We deadlocked the system to prevent crashes.✓We implemented locking mechanisms to prevent race conditions.
Deadlock is a problem to solve, not a solution to implement. You prevent deadlocks, not create them intentionally.
- ✕The application deadlocked for a few seconds.✓A deadlock occurred in the application and was automatically resolved by the timeout handler.
Deadlock is typically a state, not an action. Use passive voice or be more specific about what caused it.
Other forms(2)
- deadlock noun
"A deadlock occurs when resources are not released properly."
- deadlock (transitive/intransitive) verb
"The system can deadlock if you do not acquire locks in the correct order."
Often used with(5)
- detect a deadlock · To identify or find a deadlock in a running system
- resolve a deadlock · To fix or end a deadlock situation
- prevent deadlocks · To design code so deadlocks cannot happen
- deadlock condition · The specific circumstances that create a deadlock
- deadlock timeout · A mechanism that cancels operations stuck in deadlock
Similar words(3)
- circular wait · More technical term emphasizing the circular dependency aspect
- mutual blocking · Descriptive term but less commonly used in professional settings
- livelock · Related but different: processes are active but making no progress
Opposites(2)
- progress
- concurrency
Questions(5)
- What exactly is a deadlock in programming?
- A deadlock is a situation where two or more processes or threads are permanently blocked, each waiting for the other to release a resource. For example, Process A locks Resource 1 and waits for Resource 2, while Process B locks Resource 2 and waits for Resource 1. Neither can proceed, and the system effectively freezes on those operations.
- How do you use deadlock in a sentence at work?
- You typically use it as a noun: 'We have a deadlock in the transaction processing,' or 'A deadlock was detected and the operation was retried.' You can also use it as a verb: 'The system can deadlock if locks are not acquired in the correct order.'
- Is deadlock a formal or informal term?
- Deadlock is a neutral, technical term used in both formal documentation and casual team conversations. It is standard in computer science and appears in academic papers, technical documentation, and everyday code discussions.
- How do you prevent deadlocks?
- Common prevention strategies include: (1) always acquire locks in the same order, (2) use timeout mechanisms so waiting processes eventually give up, (3) minimize the time locks are held, (4) use higher-level abstractions like concurrent collections that handle locking internally, and (5) use database features like deadlock detection and automatic rollback.
- Is deadlock the same as a freeze or lag?
- No. A deadlock is a specific situation where processes are blocked waiting for each other. A general freeze or lag can have many causes. However, a deadlock can result in a visible freeze if critical processes are affected.
