NGINX behavior changes, stops redirecting

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NGINX behavior changes, stops redirecting

Douglas Landau
Greets,

For some reason NGINX sometimes stops serving my tomcat pages and starts wanting to serve pages from .../nginx/html/.

I don't get it.  On Friday, at 13:39, I was happily browsing my XWiki site, as you can see from the NGINX access_log.  Then from that log you see no activity until 10:31 this morning, at which time it no longer wants to redirect hits to port 8080 or to /xwiki, it just wants to serve from its own html/ subdir.  

When I come in this morning, When I go to hit the site NGINX shows me the placeholder page, .../nginx/html/index.html, which starts out "If you can see this page, ..."

I can still hit my xwiki at :8080/xwiki.   It has not been restarted, altho so what if it had?
NGINX has not been restarted, and the config files (conf/nginx.conf, conf.d/tomcat.conf) have not changed.

Anybody else seen this?  Why did it change behavior, and doe it have anything to do with the
"signal process started" messages?

Thanks

NGINX Access log, showing a few hits to xwiki at 13:39 on 05/05, then non-redirected hits at 10:31-10:41 AM on 05/08
------------------
10.13.107.52 - - [05/May/2017:13:39:39 -0700] "GET /xwiki/bin/get/Portfolio%20Management/Project%20Budget/WebHome?outputSyntax=plain&sheet=XWiki.DocumentTree&showAttachments=false&showTranslations=false&&data=children&id=document%3Axwiki%3APortfolio+Management.WebHome HTTP/1.1" 200 1671 "http://dwswiki10.westmarine.net/xwiki/bin/view/Portfolio%20Management/Project%20Budget/" "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/57.0.2987.133 Safari/537.36"
10.13.107.52 - - [05/May/2017:13:39:41 -0700] "GET /xwiki/bin/get/Portfolio%20Management/Project%20Budget/WebHome?outputSyntax=plain&sheet=XWiki.DocumentTree&showAttachments=false&showTranslations=false&&data=children&id=document%3Axwiki%3APortfolio+Management.Projects.WebHome HTTP/1.1" 200 1178 "http://dwswiki10.westmarine.net/xwiki/bin/view/Portfolio%20Management/Project%20Budget/" "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/57.0.2987.133 Safari/537.36"
10.13.107.52 - - [05/May/2017:13:39:43 -0700] "GET /xwiki/bin/get/Portfolio%20Management/Project%20Budget/WebHome?outputSyntax=plain&sheet=XWiki.DocumentTree&showAttachments=false&showTranslations=false&&data=children&id=document%3Axwiki%3APortfolio+Management.Projects.Project+A.WebHome HTTP/1.1" 200 4330 "http://dwswiki10.westmarine.net/xwiki/bin/view/Portfolio%20Management/Project%20Budget/" "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/57.0.2987.133 Safari/537.36"
10.13.107.52 - - [05/May/2017:13:39:45 -0700] "GET /xwiki/bin/get/Portfolio%20Management/Project%20Budget/WebHome?outputSyntax=plain&sheet=XWiki.DocumentTree&showAttachments=false&showTranslations=false&&data=children&id=document%3Axwiki%3APortfolio+Management.Projects.Project+A.Design.WebHome HTTP/1.1" 200 6935 "http://dwswiki10.westmarine.net/xwiki/bin/view/Portfolio%20Management/Project%20Budget/" "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/57.0.2987.133 Safari/537.36"
10.13.107.52 - - [08/May/2017:10:30:44 -0700] "GET / HTTP/1.1" 200 612 "-" "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/57.0.2987.133 Safari/537.36"
10.13.107.52 - - [08/May/2017:10:30:45 -0700] "GET /favicon.ico HTTP/1.1" 404 571 "http://dwswiki10/" "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/57.0.2987.133 Safari/537.36"
10.13.107.52 - - [08/May/2017:10:31:27 -0700] "GET /xwiki HTTP/1.1" 404 571 "-" "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/57.0.2987.133 Safari/537.36"
10.13.107.52 - - [08/May/2017:10:31:44 -0700] "GET / HTTP/1.1" 200 612 "-" "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/57.0.2987.133 Safari/537.36"
10.13.107.52 - - [08/May/2017:10:31:44 -0700] "GET /favicon.ico HTTP/1.1" 404 571 "https://dwswiki10/" "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/57.0.2987.133 Safari/537.36"
10.13.107.52 - - [08/May/2017:10:41:26 -0700] "GET / HTTP/1.1" 200 612 "-" "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.1; WOW64; Trident/7.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; .NET4.0E)"
10.13.107.52 - - [08/May/2017:10:41:26 -0700] "GET /favicon.ico HTTP/1.1" 404 571 "-" "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.1; WOW64; Trident/7.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; .NET4.0E)"
10.13.107.52 - - [08/May/2017:10:41:29 -0700] "GET / HTTP/1.1" 304 0 "-" "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.1; WOW64; Trident/7.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; .NET4.0E)"
10.13.107.52 - - [08/May/2017:10:41:29 -0700] "GET /favicon.ico HTTP/1.1" 404 571 "-" "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.1; WOW64; Trident/7.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; .NET4.0E)"



NGINX error log, showing some " signal process started" messages:
--------------------------------
2017/05/05 00:27:05 [error] 14431#0: *6148 open() "/data/nginx/html/servlet/admin" failed (2: No such file or directory), client: 10.13.122.42, server: localhost, request: "GET /servlet/admin?category=server&method=listAll&Authorization=Digest+username%3D%22admin%22%2C+response%3D%22ae9f86d6beaa3f9ecb9a5b7e072a4138%22%2C+nonce%3D%222b089ba7985a883ab2eddcd3539a6c94%22%2C+realm%3D%22adminRealm%22%2C+uri%3D%22%2Fservlet%2Fadmin%22&service= HTTP/1.0"
2017/05/05 00:27:05 [error] 14431#0: *6152 open() "/data/nginx/html/servlet/admin" failed (2: No such file or directory), client: 10.13.122.42, server: localhost, request: "GET /servlet/admin?category=server&method=listAll&Authorization=Digest+username%3D%22admin%22%2C+response%3D%22ae9f86d6beaa3f9ecb9a5b7e072a4138%22%2C+nonce%3D%222b089ba7985a883ab2eddcd3539a6c94%22%2C+realm%3D%22adminRealm%22%2C+uri%3D%22%2Fservlet%2Fadmin%22&service= HTTP/1.0"
2017/05/05 00:27:05 [error] 14431#0: *6156 "/data/nginx/html/HTTP1.0/index.html" is not found (2: No such file or directory), client: 10.13.122.42, server: localhost, request: "GET /HTTP1.0/"
2017/05/05 00:27:12 [error] 14431#0: *6443 open() "/data/nginx/html/home.htm" failed (2: No such file or directory), client: 10.13.122.42, server: localhost, request: "GET /home.htm HTTP/1.1", host: "10.13.4.247"
2017/05/05 00:27:16 [error] 14431#0: *6550 open() "/data/nginx/html/spipe" failed (2: No such file or directory), client: 10.13.122.42, server: localhost, request: "POST /spipe?Source=nessus HTTP/1.0"
2017/05/05 00:27:16 [error] 14431#0: *6552 open() "/data/nginx/html/spipe" failed (2: No such file or directory), client: 10.13.122.42, server: localhost, request: "POST /spipe?Source=nessus HTTP/1.0"
2017/05/05 00:27:20 [error] 14431#0: *6661 open() "/data/nginx/html/logout" failed (2: No such file or directory), client: 10.13.122.42, server: localhost, request: "GET /logout HTTP/1.0"
2017/05/05 00:27:20 [error] 14431#0: *6668 open() "/data/nginx/html/logout" failed (2: No such file or directory), client: 10.13.122.42, server: localhost, request: "GET /logout HTTP/1.0"
2017/05/05 00:27:22 [error] 14431#0: *6752 open() "/data/nginx/html/yYWiy2DH.asp" failed (2: No such file or directory), client: 10.13.122.42, server: localhost, request: "GET //yYWiy2DH.asp HTTP/1.0"
2017/05/05 00:27:22 [error] 14431#0: *6757 open() "/data/nginx/html/tnq0ObbP.asp" failed (2: No such file or directory), client: 10.13.122.42, server: localhost, request: "GET //tnq0ObbP.asp HTTP/1.0"
2017/05/05 00:27:25 [error] 14431#0: *6882 open() "/data/nginx/html/content/YmEIoHwZQ6.mp3" failed (2: No such file or directory), client: 10.13.122.42, server: localhost, request: "GET /content/YmEIoHwZQ6.mp3 HTTP/1.0"
2017/05/05 00:27:25 [error] 14431#0: *6885 open() "/data/nginx/html/content/YmEIoHwZQ6.mp3" failed (2: No such file or directory), client: 10.13.122.42, server: localhost, request: "GET /content/YmEIoHwZQ6.mp3 HTTP/1.0"
2017/05/05 00:27:46 [error] 14431#0: *7313 open() "/data/nginx/html/iControl/iControlPortal.cgi" failed (2: No such file or directory), client: 10.13.122.42, server: localhost, request: "POST http://127.0.0.1/iControl/iControlPortal.cgi HTTP/1.1", host: "dwswiki10.westmarine.net"
2017/05/05 00:27:46 [error] 14431#0: *7315 open() "/data/nginx/html/iControl/iControlPortal.cgi" failed (2: No such file or directory), client: 10.13.122.42, server: localhost, request: "POST http://127.0.0.1/iControl/iControlPortal.cgi HTTP/1.1", host: "dwswiki10.westmarine.net"
2017/05/05 00:27:47 [error] 14431#0: *7342 open() "/data/nginx/html/.anydomain.test" failed (2: No such file or directory), client: 10.13.122.42, server: localhost, request: "GET /.anydomain.test HTTP/1.0"
2017/05/05 00:27:47 [error] 14431#0: *7343 open() "/data/nginx/html/.anydomain.test" failed (2: No such file or directory), client: 10.13.122.42, server: localhost, request: "GET /.anydomain.test HTTP/1.0"
2017/05/05 00:27:47 [error] 14431#0: *7345 open() "/data/nginx/html/index.jsp" failed (2: No such file or directory), client: 10.13.122.42, server: localhost, request: "GET /index.jsp HTTP/1.1", host: "sjfklsjfkldfjklsdfjdlksjfdsljk.foo."
2017/05/05 00:27:48 [error] 14431#0: *7351 open() "/data/nginx/html/index.jsp" failed (2: No such file or directory), client: 10.13.122.42, server: localhost, request: "GET /index.jsp HTTP/1.1", host: "sjfklsjfkldfjklsdfjdlksjfdsljk.foo."
2017/05/05 00:27:50 [crit] 14431#0: *7396 SSL_do_handshake() failed (SSL: error:14094085:SSL routines:SSL3_READ_BYTES:ccs received early) while SSL handshaking, client: 10.13.122.42, server: 0.0.0.0:443
2017/05/05 00:27:50 [crit] 14431#0: *7397 SSL_do_handshake() failed (SSL: error:05066066:Diffie-Hellman routines:COMPUTE_KEY:invalid public key error:1408B005:SSL routines:SSL3_GET_CLIENT_KEY_EXCHANGE:DH lib) while SSL handshaking, client: 10.13.122.42, server: 0.0.0.0:443
2017/05/05 10:40:33 [notice] 20325#0: signal process started
2017/05/05 10:41:12 [notice] 20357#0: signal process started
2017/05/05 10:43:18 [notice] 20416#0: signal process started
2017/05/05 12:59:34 [notice] 23321#0: signal process started
2017/05/08 10:30:45 [error] 23325#0: *132 open() "/data/nginx/html/favicon.ico" failed (2: No such file or directory), client: 10.13.107.52, server: localhost, request: "GET /favicon.ico HTTP/1.1", host: "dwswiki10", referrer: "http://dwswiki10/"
2017/05/08 10:31:27 [error] 23325#0: *132 open() "/data/nginx/html/xwiki" failed (2: No such file or directory), client: 10.13.107.52, server: localhost, request: "GET /xwiki HTTP/1.1", host: "dwswiki10"
2017/05/08 10:31:44 [error] 23325#0: *140 open() "/data/nginx/html/favicon.ico" failed (2: No such file or directory), client: 10.13.107.52, server: localhost, request: "GET /favicon.ico HTTP/1.1", host: "dwswiki10", referrer: "https://dwswiki10/"
2017/05/08 10:40:43 [notice] 16545#0: signal process started
2017/05/08 10:41:26 [error] 16566#0: *1 open() "/data/nginx/html/favicon.ico" failed (2: No such file or directory), client: 10.13.107.52, server: localhost, request: "GET /favicon.ico HTTP/1.1", host: "dwswiki10"
2017/05/08 10:41:29 [error] 16566#0: *1 open() "/data/nginx/html/favicon.ico" failed (2: No such file or directory), client: 10.13.107.52, server: localhost, request: "GET /favicon.ico HTTP/1.1", host: "dwswiki10"
2017/05/08 10:42:26 [notice] 16651#0: signal process started



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