Articles/Java

OutOfMemoryError in Java — What It Means and How to Fix It

What Java's OutOfMemoryError means and how to fix it.

Published November 2, 2026

OutOfMemoryError is thrown when the JVM can't allocate more memory because the heap is full.

Key points

  • Read the full stack trace from the top — it names the exact class, method, and line where the exception originated

Example

Can indicate a genuine need for more heap space (-Xmx) or a memory leak keeping objects alive unnecessarily
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