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+--- Thread: LM crash (/showthread.php?tid=1668)
LM crash - Thomas - 22.10.2018
Hello
My LM randomly crashes. It happens once in five days. Can I investigate what's wrong?
Pictures containing logs attached. Every "System Start" is a LM crash.
What represent these three numbers right to CPU/IO? Are they user/kernel/IO? Can I check why the middle number is so high?
Thank you
RE: LM crash - admin - 22.10.2018
One of possible reboot reasons can be out-of-memory condition. This can be caused by too many resident scripts running in parallel and/or loops in event scripts. You can see all running processes in System config.
RE: LM crash - Thomas - 22.10.2018
Sorry attached logs here. I forgot press "Add Attachment" button.
(22.10.2018, 11:40)admin Wrote: One of possible reboot reasons can be out-of-memory condition. This can be caused by too many resident scripts running in parallel and/or loops in event scripts. You can see all running processes in System config.
I've 10 resident scripts running. You're right, there could be an infinity loop. Can I discover it somehow? Like logging to a different computer through rsyslog etc?
RE: LM crash - admin - 22.10.2018
Finding loops can be a tricky task. Try running ETS group monitor for some time.
RE: LM crash - Thomas - 22.10.2018
I turned on "Remote diagnostics" on my LM. Can I connect through SSH to the LM? I tried my admin password, communication password, a regular user but with no luck.
RE: LM crash - admin - 22.10.2018
We do not provide instructions on how to get root SSH access to LM. It's not that hard, but you'll have to figure it out yourself
RE: LM crash - Thomas - 24.10.2018
I think one of possible reason for LM crashing is the webserver consuming big portion of the memory. Do you have any suggestion how to lower this number? Can I switch on more aggressive caching at clients?
Thank you
RE: LM crash - admin - 24.10.2018
Do you have many active visualization clients connected?
RE: LM crash - Thomas - 25.10.2018
I don't know because LM doesn't show active clients. My guess is something between 100-200.
I've found that LM stop crashing after I stop using remote.
RE: LM crash - admin - 25.10.2018
Do you mean cloud access or remote http services?
RE: LM crash - Thomas - 25.10.2018
(25.10.2018, 10:02)admin Wrote: Do you mean cloud access or remote http services?
It can be just coincidence but since I turned remote requests off my LM is still on with no interruption. Unfortunately the issue is hardly reproducible because it happens once or twice a day.
Remote HTTP access (object set as "export", Remote service Enabled)
I use this service for data exchange between our attendance system and KNX.
The attendance system simply sends update request when doors are opened/closed.
The request looks like this: http://LM_name/scada-remote?m=json&r=grp&fn=write&alias=1/1/1;&value=1
Another interesting part is sometimes response from LM to remote request is extremely slow. I had to set timeout for reply to 20s.
Code written in C# I use in the interface between ACS and LM is simple and is below. It uses synchronous GetResponse .NET 4.0 functionality.
Code:
public HttpStatusCode HttpGetSync(string urlParams)
{
string uri;
HttpStatusCode statusCode = HttpStatusCode.BadRequest;
if (!(restapi.url.Length > 0)) return statusCode;
if (!(urlParams.Length > 0)) return statusCode;
uri = restapi.url + urlParams;
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(uri);
if (netCredential != null)
{
request.Credentials = netCredential;
request.PreAuthenticate = true;
}
request.Method = "GET";
if (restapi.timeout > 0)
{
request.Timeout = restapi.timeout;
request.ServicePoint.ConnectionLeaseTimeout = restapi.timeout;
request.ServicePoint.MaxIdleTime = restapi.timeout;
}
request.ContentType = "text/html";
request.CachePolicy = reqCachePolicy;
request.Proxy = null;
request.KeepAlive = false;
using (HttpWebResponse response = (HttpWebResponse)request.GetResponse()) {
statusCode=response.StatusCode;
response.Close();
} ;
request.Abort();
GC.Collect();
return statusCode;
}RE: LM crash - admin - 25.10.2018
Use attached .lp file to show a list of connected clients. Upload it to user directory via ftp (apps username), then access it via http://LM_IP/user/clients.lp
Also, please upload your backup somewhere and send via PM so I can test remote access time.
RE: LM crash - Thomas - 26.10.2018
(25.10.2018, 13:55)admin Wrote: Use attached .lp file to show a list of connected clients. Upload it to user directory via ftp (apps username), then access it via http://LM_IP/user/clients.lp
Also, please upload your backup somewhere and send via PM so I can test remote access time.
Thank you. Check your PM