Intermittent test failure: com.github.ambry.network.SelectorTest > testEmptyRequest[1]

[jsjtzyy]

com.github.ambry.network.SelectorTest > testEmptyRequest[1] FAILED
    java.lang.AssertionError: HeapMemoryLeak: [allocation|deallocation] before test[10042|10040], after test[10046|10043] expected:<2> but was:<3>
        at org.junit.Assert.fail(Assert.java:91)
        at org.junit.Assert.failNotEquals(Assert.java:645)
        at org.junit.Assert.assertEquals(Assert.java:126)
        at org.junit.Assert.assertEquals(Assert.java:470)
        at com.github.ambry.utils.NettyByteBufLeakHelper.afterTest(NettyByteBufLeakHelper.java:94)
        at com.github.ambry.network.SelectorTest.after(SelectorTest.java:58)