Lookup Issue - CACHE_NOT_INITIALIZED

Hi,

I am new to Druid. I could able to configure and execute queries with map Type lookup.
Now I have been trying for cachedNamespace lookup.
Through Druid UI console I have added a lookup. The Lookup configuration is as follows:-

{
“type”: “cachedNamespace”,
“extractionNamespace”: {
“type”: “uri”,
“uriPrefix”: “file:/Home/test/”,
“namespaceParseSpec”: {
“format”: “csv”,
“skipHeaderRows”: 1,
“hasHeaderRow”: true,
“columns”: [
“[“key””,
““value”]”
]
},
“pollPeriod”: “PT30S”
},
“injective”: true
}

The csv file contains below data

key,value
PH12150000761, Test Hub

When I try to query getting the below errors:

Druid Broker log:

WARN [sql[18c6bd5d-d1ee-4b3f-8108-03fdd707fed7]] org.apache.druid.server.QueryLifecycle - Exception while processing queryId [28575579-12d0-41e7-9270-e169c5c9a336] (QueryInterruptedException{msg=namespace [UriExtractionNamespace{uri=null, uriPrefix=file:/Home/test/, namespaceParseSpec=CSVFlatDataParser{columns=[[“key”, “value”]], keyColumn=’[“key”’, valueColumn=’“value”]’}, fileRegex=‘null’, pollPeriod=PT30S}] : org.apache.druid.server.lookup.namespace.cache.CacheScheduler$EntryImpl@20ab81e2: CACHE_NOT_INITIALIZED, extractorID = namespace-factory-UriExtractionNamespace{uri=null, uriPrefix=file:/Home/test/, namespaceParseSpec=CSVFlatDataParser{columns=[[“key”, “value”]], keyColumn=’[“key”’, valueColumn=’“value”]’}, fileRegex=‘null’, pollPeriod=PT30S}-5bcab32a-0159-4c6f-b347-b64cadfd9e66, code=Unknown exception, class=org.apache.druid.java.util.common.ISE, host=localhost:8083})

Druid Historical Log

ERROR [NamespaceExtractionCacheManager-1] org.apache.druid.server.lookup.namespace.cache.CacheScheduler - Failed to update namespace [UriExtractionNamespace{uri=null, uriPrefix=file:/Home/test/, namespaceParseSpec=CSVFlatDataParser{columns=[[“key”, “value”]], keyColumn=’[“key”’, valueColumn=’“value”]’}, fileRegex=‘null’, pollPeriod=PT30S}] : org.apache.druid.server.lookup.namespace.cache.CacheScheduler$EntryImpl@20ab81e2

the following works

“type”: “cachedNamespace”,
“extractionNamespace”: {
“type”: “uri”,
“uriPrefix”: “file:/home/test”,
“fileRegex”: “lkp1.csv”,
“namespaceParseSpec”: {
“format”: “csv”,
“hasHeaderRow”: true,
“skipHeaderRows”: 0,
“columns”: [
“key”,
“value”
],
“keyColumn”: “key”,
“valueColumn”: “value”
}
}
}