some questions about use influxdb as skywalking's storage

[danishlyy]

hello ,I used influxdb as skywalking storage, but I meet some problems on this storage,when I click trace or log button on skywalking-ui，the skywalking-oap-server.log shows errors,like this:
2021-11-29 17:28:00,342 - org.apache.skywalking.oap.server.core.analysis.ApdexThresholdConfig - 65 [grpcServerPool-1-thread-8] WARN [] - Pick up system reserved threshold 500ms because of config missing
2021-11-29 17:28:12,304 - graphql.execution.SimpleDataFetcherExceptionHandler - 23 [qtp233309087-291] WARN [] - Exception while fetching data (/queryLogs) : null
java.lang.NullPointerException: null
at org.apache.skywalking.oap.server.storage.plugin.influxdb.query.LogQuery.queryLogs(LogQuery.java:149) ~[storage-influxdb-plugin-8.7.0.jar:8.7.0]
at org.apache.skywalking.oap.server.core.query.LogQueryService.queryLogs(LogQueryService.java:83) ~[server-core-8.7.0.jar:8.7.0]
at org.apache.skywalking.oap.query.graphql.resolver.LogQuery.queryLogs(LogQuery.java:65) ~[query-graphql-plugin-8.7.0.jar:8.7.0]
at org.apache.skywalking.oap.query.graphql.resolver.LogQueryMethodAccess.invoke(Unknown Source) ~[reflectasm-1.11.7.jar:8.7.0]
at com.coxautodev.graphql.tools.MethodFieldResolverDataFetcher.get(MethodFieldResolver.kt:147) ~[graphql-java-tools-5.2.3.jar:?]
at graphql.execution.ExecutionStrategy.fetchField(ExecutionStrategy.java:227) ~[graphql-java-8.0.jar:?]

I consider that my configuration exists something wrong or the influxdb-plugin has bug?

[wu-sheng]

It seems an InfluxDB query timeout.

@dmsolr PTAL.

[danishlyy]

` final Logs logs = new Logs();
QueryResult.Result counter = results.get(0);
QueryResult.Result seriesList = results.get(1);

    logs.setTotal(((Number) counter.getSeries().get(0).getValues().get(0).get(1)).intValue());
    seriesList.getSeries().forEach(series -> {`

I read the code and find that seriesList is null or seriesList.getSeries() is null ,I want know that if there has any advice to me solve this situation. thanks
I use the skywalking 8.7.0 version ,the download link is https://archive.apache.org/dist/skywalking/8.7.0/apache-skywalking-apm-es7-8.7.0.tar.gz