@Test
  public void testThreadingSlowWriterSmallBuffer() throws Exception {
    // The logic of this test has conflict with the limit writers split logic, skip this test for
    // TestWALSplitBoundedLogWriterCreation
    assumeFalse(this instanceof TestWALSplitBoundedLogWriterCreation);
    doTestThreading(200, 1024, 50);
  }
Test blocking behavior of the log split process if writers are writing slower than the reader
is reading.
hbase-server/src/test/java/org/apache/hadoop/hbase/wal/TestWALSplit.java