JIRA cannot install plugin

[Yanduganov Andrey]

Hi!

I develop plugin for JIRA and it works fine when I use quick reload.

Now I try to insyall my plugin and I have error:

[INFO] [talledLocalContainer] 2017-08-02 15:09:12,261 http-nio-2990-exec-3 WARN a_yanduganov 909x1215x1 jztod9 10.16.33.34 /rest/plugins/1.0/ [o.o.core.entity.SequenceUtil] [SequenceUtil.SequenceBank.fillBank] SQL Exception
[INFO] [talledLocalContainer] com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure

 Full error listing very large so I will not inclure it. Installation pop-up window never sloses.

I already restart JIRA. Nothing changes.

Any ideas?

Thanks.

[Nic Brough -Adaptavist-]

There are three broad possibilities here, but we can't tell you much more without a trace of the log showing us the cause.

1.  You have a poorly set up or unreliable database connection

2.  Your add-on is causing JIRA to execute some SQL which breaks the database connection

3.  Your add-on is directly executing some SQL which breaks the database connection 

The only thing I can think that might cause 2 or 3 that is a massive inefficient query is being run and it times out.

[Yanduganov Andrey]

Hi, Nic.

In my local JIRA I solve this problem. I just delete one service which also generates many errors (I dont know why and how this things related, because I deleted Active-Directory-Attributes-Sync).

BUT! In another standalone JIRA instance I have same problem, but I have no anything errors. JIRA don't writes any logs. I cannot find any reasons for that behaivor.