DataEngPrep.tech
QuestionsBlogStore
Get PDF Bundle
Home/Questions/General/Other/An existing job running longer suddenly: how to analyze the issue?

An existing job running longer suddenly: how to analyze the issue?

General/Othermedium0.4 min readPremium
Frequency
Low
Asked at 1 company
Category
243
questions in General/Other
Difficulty Split
151E|43M|49H
in this category
Total Bank
1,863
across 7 categories
Asked at these companies
Citi
Interview Pro Tip

Pro-Move: 'We had a job slow 3×—Spark UI showed 1 partition at 2hr; added salting, back to 30min.' Red Flag: Restarting or adding resources without diagnosing—mask the problem.

Key Concepts Tested
partitionspark
Expert AnswerPremium
71 wordsInterview-ready
**STAR approach**: **Situation**: Job ran 2 hr, now 6 hr. **Task**: Find root cause. **Analysis**: (1) Data volume growth—compare input size. (2) Skew—Spark UI shows uneven partitions. (3) Resource contention—other jobs. (4) Source throttling—DB or API limits. (5) Partition pruning—missing partitions? **Actions**: Add partitions; salting for skew; increase resources; fix source limits. **Result**: Document in runbook; add monitoring....
The complete answer continues with detailed implementation patterns, architectural trade-offs, and production-grade considerations. It covers performance optimization strategies, common pitfalls to avoid, and real-world examples from companies like Citi. The answer also includes follow-up discussion points that interviewers commonly explore.

Continue Reading the Full Answer

Unlock the complete expert answer with code examples, trade-offs, and pro tips - plus 1,863+ more.

Create Free Account - Unlock 30 Answers
Get PDF Bundle - from $21

Or upgrade to Platform Pro - $39

Engineers who used these answers got offers at

AmazonDatabricksSnowflakeGoogleMeta

Related General/Other Questions

hardHave you worked on Data Warehousing projects?FreemediumHow would you read data from a web API? What steps would you follow after reading the data?FreehardRetrieve the most recent sale_timestamp for each product (Latest Transaction).FreehardWhat is the difference between OLTP and OLAP?FreemediumWhat is the difference between SQL and NoSQL databases?Free

According to DataEngPrep.tech, this is one of the most frequently asked General/Other interview questions, reported at 1 company. DataEngPrep.tech maintains a curated database of 1,863+ real data engineering interview questions across 7 categories, verified by industry professionals.

← Back to all questionsMore General/Other questions →