Input does not start with Smile format header (first byte = 0x3c) and parser has REQUIRE_HEADER enabled: can not parse

Hi Team,

Anyone of you got similar error while LDAP authentication is enabled? Of this error does the warning “Input does not start with Smile format header (first byte = 0x3c) and parser has REQUIRE_HEADER enabled: can not parse” has any importance? What could this mean?

2020-02-05T11:33:11,269 DEBUG [HttpClient-Netty-Worker-1] org.apache.druid.java.util.http.client.NettyHttpClient - [GET https://vmaoka66901102.us.bank-dns.com:7081/druid-ext/basic-security/authentication/db/ldap/cachedSerializedUserMap] Got response: 401 Unauthorized

2020-02-05T11:33:11,273 WARN [main] org.apache.druid.java.util.common.RetryUtils - Retrying (3 of 9) in 5,232ms.

com.fasterxml.jackson.core.JsonParseException: Input does not start with Smile format header (first byte = 0x3c) and parser has REQUIRE_HEADER enabled: can not parse

at [Source: (byte)"

Error 401 Unauthorized

HTTP ERROR 401

Problem accessing /druid-ext/basic-security/authentication/db/ldap/cachedSerializedUserMap. Reason:

    Unauthorized

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"; line: -1, column: 0]

Thanks

Soumya

Thank you. We were able to fix this by correcting the configuration