Why is there such a warning?
Severe: Servlet [init InitServlet] in web application [/RecommendOnSpark] threw the load () exception
Java. Lang. UnsatisfiedLinkError: org. Apache. Hadoop. Util. NativeCrc32. NativeComputeChunkedSums (IILjava/nio ByteBuffer; ILjava/nio ByteBuffer. IILjava/lang/String; JZ) V