启动tomcat时，我正在追随某些动物，有人可以帮我解决吗？或告诉我我得到这个的原因。
val spark = SparkSession
.builder()
.appName("ESToMongoDataUpload")
.config("es.nodes", Config.ES_NODES)
.config("es.net.http.auth.user", Config.ES_NET_HTTP_AUTH_USER)
.config("es.net.http.auth.pass", Config.ES_NET_HTTP_AUTH_PASS)
.config("es.net.ssl", Config.ES_NET_SSL)
.config("es.nodes.wan.only", Config.ES_NODES_WAN_ONLY)
.config("es.read.field.as.array.include", esConfig)
.config("es.read.metadata", true)
.config("spark.es.mapping.date.rich", false)
.getOrCreate()
import spark.implicits._
val df = spark.read
.format("org.elasticsearch.spark.sql")
.option("query", esQuery)
.option("pushdown", "true")
.option("scroll.size", 10000)
.load(Config.ES_RESOURCE)
.withColumn("_id", $"_metadata".getItem("_id"))
.drop("_metadata")
我在本地使用tomcat 8.5。启动服务器时，有时会出现此错误。
java.lang.NullPointerException
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:493)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81)
org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:660)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:798)
org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:808)
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1498)
org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
java.lang.Thread.run(Thread.java:748)