"endpoint" tag may contain invalid character in PerfFilter

[dongbin86]

system-monitor | ERROR ] Error occurred while pushing monitor counters for ubuntu. Reason: com.fasterxml.jackson.core.JsonParseException: Unexpected character ('<' (code 60)): expected a valid value (number, String, array, object, 'true', 'false' or 'null')
at [Source: (String)"<title>Bad Request</title>

<style></style>

"[truncated 442 chars]; line: 1, column: 2]