ERROR Uncaught exception in REST call to /favicon.ico (org.apache.kafka.connect.runtime.rest.errors.ConnectExceptionMapper:61)

I am getting the below favicon.ico error for the Kafka source connectors. Anyone have an idea how to fix it, that would be a great help. It loads lacks or thousands of records from oracle to Cassandra using Kafka connector. We restarted the connectors and Kafka server but still issue not resolved.

Source connector properties:

"connector.class": "io.confluent.connect.jdbc.JdbcSourceConnector",
"timestamp.column.name": "UPDT_TS",
"transforms.createKey.type": "org.apache.kafka.connect.transforms.ValueToKey",
"connection.password": "${file:/usr/local/kafka/kafka/secret.properties:oraPassword}",
"tasks.max": "1",
"query": "select sys_id||'-'||sales_org||'-'||brand||'-'||product||'-'||mat_num||'-'||country||'-'||plant as \"id\", sys_id as \"sys_id\",sales_org as \"sales_org\",brand as \"brand\",product as \"product\",mat_num as \"mat_num\",country as \"country\",plant as \"plant\",apo_ind as \"apo_ind\",to_char(availability_date,'YYYY-MM-DD HH24:MI:SS') as \"availability_date\",base_unit_of_msr as \"base_unit_of_msr\",to_char(created_date,'YYYY-MM-DD HH24:MI:SS') as \"created_date\",to_char(unrest_use_stock) as \"unrest_use_stock\",to_char(updt_ts,'YYYY-MM-DD HH24:MI:SS') as \"updt_ts2\",updt_ts FROM availability",
"connection.attempts": "10000",
"transforms": "createKey,extractInt",
"transforms.extractInt.type": "org.apache.kafka.connect.transforms.ExtractField$Key",
"batch.max.rows": "3000",
"timestamp.delay.interval.ms": "120000",
"table.types": "query",
"mode": "timestamp",
"topic.prefix": "avail_topic2",
"tables": "",
"transforms.extractInt.field": "id",
"task.class": "io.confluent.connect.jdbc.source.JdbcSourceTask",
"schema.pattern": "",
"transforms.createKey.fields": "id",
"connection.user": "${file:/usr/local/kafka/kafka/secret.properties:oraUsername}",
"poll.interval.ms": "10000",
"name": "jdbc_avail_connector",
"connection.url": "jdbc:oracle:thin:@****:***"`

Recently it is not loading any data we seeing the below error in the logs.

ERROR Uncaught exception in REST call to /favicon.ico (org.apache.kafka.connect.runtime.rest.errors.ConnectExceptionMapper:61)
javax.ws.rs.NotFoundException: HTTP 404 Not Found
    at org.glassfish.jersey.server.ServerRuntime$1.run(ServerRuntime.java:250)
    at org.glassfish.jersey.internal.Errors$1.call(Errors.java:248)
    at org.glassfish.jersey.internal.Errors$1.call(Errors.java:244)
    at org.glassfish.jersey.internal.Errors.process(Errors.java:292)
    at org.glassfish.jersey.internal.Errors.process(Errors.java:274)
    at org.glassfish.jersey.internal.Errors.process(Errors.java:244)
    at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:265)
    at org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:232)
    at org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:679)
    at org.glassfish.jersey.servlet.WebComponent.serviceImpl(WebComponent.java:392)
    at org.glassfish.jersey.servlet.WebComponent.service(WebComponent.java:346)
    at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:365)
    at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:318)
    at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:205)
    at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:873)
    at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:542)
    at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:255)
    at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1700)
    at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:255)
    at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1345)
    at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:203)
    at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:480)
    at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1667)
    at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:201)
    at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1247)
    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:144)
    at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:220)
    at org.eclipse.jetty.server.handler.StatisticsHandler.handle(StatisticsHandler.java:174)
    at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
    at org.eclipse.jetty.server.Server.handle(Server.java:505)
    at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:370)
    at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:267)
    at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:305)
    at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:103)
    at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:117)
    at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:333)
    at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:310)
    at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:168)
    at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:126)
    at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:366)
    at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:698)
    at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:804)
    at java.lang.Thread.run(Thread.java:748)