tillrohrmann commented on a change in pull request #11408:
[FLINK-15989][FLINK-16225] Improve direct and metaspace out-of-memory error
handling
URL: https://github.com/apache/flink/pull/11408#discussion_r393784214
##########
File path:
flink-core/src/main/java/org/apache/flink/core/memory/MemorySegmentFactory.java
##########
@@ -94,7 +99,15 @@ public static MemorySegment
allocateUnpooledOffHeapMemory(int size) {
* @return A new memory segment, backed by unpooled off-heap memory.
*/
public static MemorySegment allocateUnpooledOffHeapMemory(int size,
Object owner) {
- ByteBuffer memory = ByteBuffer.allocateDirect(size);
+ ByteBuffer memory;
+ try {
+ memory = ByteBuffer.allocateDirect(size);
+ } catch (OutOfMemoryError e) {
+ if (ExceptionUtils.isDirectOutOfMemoryError(e)) {
+
LOG.error(ExceptionUtils.TM_DIRECT_OOM_ERROR_MESSAGE, e);
+ }
+ throw e;
+ }
Review comment:
Why do we need this special exception handling here? Wouldn't it be better
if we let the exception bubble up and treat OOMs consistently in a single place
(e.g. fatal error handler, or the entrypoint if this is an exception which
occurs during initialization)?
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