dawidwys commented on a change in pull request #18865:
URL: https://github.com/apache/flink/pull/18865#discussion_r814647353
##########
File path:
flink-runtime/src/test/java/org/apache/flink/runtime/io/network/buffer/NetworkBufferPoolTest.java
##########
@@ -292,6 +292,52 @@ public void
testRequestMemorySegmentsMoreThanTotalBuffers() {
}
}
+ /**
+ * Tests {@link NetworkBufferPool#requestUnpooledMemorySegments(int)} with
the total number of
+ * allocated buffers for several requests exceeding the capacity of {@link
NetworkBufferPool}.
+ */
+ @Test
+ public void testInsufficientNumberOfBuffers() throws Exception {
+ final int numberOfSegmentsToRequest = 5;
+
+ final NetworkBufferPool globalPool = new
NetworkBufferPool(numberOfSegmentsToRequest, 128);
+
+ try {
+ // the global pool should be in available state initially
+ assertTrue(globalPool.getAvailableFuture().isDone());
+
+ // request 5 segments
+ List<MemorySegment> segments1 =
+
globalPool.requestUnpooledMemorySegments(numberOfSegmentsToRequest);
+ assertFalse(globalPool.getAvailableFuture().isDone());
+ assertEquals(numberOfSegmentsToRequest, segments1.size());
+
+ try {
+ // request only 1 segment
+ globalPool.requestUnpooledMemorySegments(1);
+
+ fail("Request for the new buffer should fail since buffers are
not enough.");
+ } catch (IOException insufficientNumberOfBuffer) {
+ assertTrue(
+ insufficientNumberOfBuffer
+ .getMessage()
+ .contains("Insufficient number of network
buffers"));
+ }
Review comment:
Use `assertThrows`?
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