Hi,

first thanks for this awesome software. But I have some trouble and I don't know how to proceed. First I try to find out what else I could provide for this report to be a good bug report.

First, I use the latest version (v1.14.0) from openSUSE build Service. I know, I should compile it by my self to avoid any other causes for this behavior. But for now I still use this package from there

What happened:

When creating a Slack contact point, I am unable to save unless the Webhook URL field is populated. However, right above the field, it says that the field is optional. This doesn't make sense.

Also, if you are trying to make a token-based (non-webhook) Slack bot, this bug makes it impossible. Token-based bots must have a blank webhook URL, or it'll try to send it as a we

Bug Description
fix issues found by Coverity Scan in taosdump.c

To Reproduce
Steps to reproduce the behavior:
N/A

Expected Behavior
fix following issues found by Coverity Scan in taosdump.c

1. String not null terminated High TDengine/src/kit/taos-tools/src/benchUtil.c postProceSql
2. Resource leak High TDengine/src/kit/taos-tools/src/taosdump.c parse_json_to_recordschema
   3

Relevant telegraf.conf:

[[inputs.openweathermap]]
  app_id = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
  

Scenario

A user is ingesting some data (~300M rows) into a table with 270K distinct symbol values. For each of these 270K symbols we end up with at least one posix_fallocate() necessary to add a new value block. See the below flamegraph - it's quite illustrative.

An important part of the scenario is non-default index block capacity which is set to 2048. With the default capacity (w