In August, employment openings fell to a one and a half year low. Less hiring and job openings may indicate that the U.S. economy is beginning to cool, following a long period of growth. However, there have yet to be signs of a recession- there are still a good number of job openings. The decrease may be owed, in part, to the ongoing trade war between the U.S. and China which has harmed business confidence.
See "Decreasing U.S. job openings point to cooling labor market", Lucia Mutikani, Reuters, October 9, 2019