Hi,
I am setting up a thredds data server on a local machine to serve some data
for private use within our research group. I have used the docker image
*unidata/thredds-docker:latest* to install and setup the server. I have
also managed to create and add a catalog. After setting up the server, I
have noticed a peculiar behaviour. If I use tools like *nco* etc. on the
machine where I have installed a thredds server, I am able to access the
data. However, when I try to access the data from a different machine, I
get a syntax error.
I have tested to see if the file is accessible from the thredds server.
Below, you can see the output from *ncdump*.
ncdump -t -v time
http://138.194.55.191/thredds/dodsC/worldclim/historical/2.5m/prec/wc2.1_2.5m_prec.ncnetcdf
wc2.1_2.5m_prec {
dimensions:
time = UNLIMITED ; // (12 currently)
lat = 4320 ;
lon = 8640 ;
variables:
double time(time) ;
time:standard_name = "time" ;
time:long_name = "time" ;
time:units = "months since 1985-01-01" ;
time:calendar = "standard" ;
time:axis = "T" ;
time:_ChunkSizes = 512 ; // "2027-09-01"
double lon(lon) ;
lon:standard_name = "longitude" ;
lon:long_name = "longitude" ;
lon:units = "degrees_east" ;
lon:axis = "X" ;
double lat(lat) ;
lat:standard_name = "latitude" ;
lat:long_name = "latitude" ;
lat:units = "degrees_north" ;
lat:axis = "Y" ;
float prec(time, lat, lon) ;
prec:units = "mm" ;
prec:_FillValue = -32768.f ;
prec:missing_value = -32768.f ;
prec:long_name = "precipitation" ;
prec:_ChunkSizes = 1, 7, 8640 ;
// global attributes:
:CDI = "Climate Data Interface version 1.9.3 (http://mpimet.mpg.de/cdi)" ;
:history = "Thu Apr 30 17:43:57 2020: GDAL CreateCopy( ./
wc2.1_2.5m_prec_01.nc, ... )" ;
:GDAL_AREA_OR_POINT = "Area" ;
:GDAL = "GDAL 2.1.3, released 2017/20/01" ;
:CDO = "Climate Data Operators version 1.9.3 (http://mpimet.mpg.de/cdo)" ;
:Conventions = "CF-1.5" ;
:DODS_EXTRA.Unlimited_Dimension = "time" ;
data:
time = "1985-01-01", "1985-02-01", "1985-03-01", "1985-04-01",
"1985-05-01",
"1985-06-01", "1985-07-01", "1985-08-01", "1985-09-01", "1985-10-01",
"1985-11-01", "1985-12-01" ;
}
When I try to access the file using* ncks* e.g.,
ncks -d time,0,1,1 -v prec
http://138.194.55.191/thredds/dodsC/worldclim/historical/2.5m/prec/wc2.1_2.5m_prec.nc
temp.nc
I get the following error
syntax error, unexpected WORD_WORD, expecting SCAN_ATTR or SCAN_DATASET or
SCAN_ERROR
context: <!doctype^ html><html lang="en"><head><title>HTTP Status 400 – Bad
Request</title><style type="text/css">body
{font-family:Tahoma,Arial,sans-serif;} h1, h2, h3, b
{color:white;background-color:#525D76;} h1 {font-size:22px;} h2
{font-size:16px;} h3 {font-size:14px;} p {font-size:12px;} a {color:black;}
.line
{height:1px;background-color:#525D76;border:none;}</style></head><body><h1>HTTP
Status 400 – Bad Request</h1><hr class="line" /><p><b>Type</b> Exception
Report</p><p><b>Message</b> Invalid character found in the request target.
The valid characters are defined in RFC 7230 and RFC
3986</p><p><b>Description</b> The server cannot or will not process the
request due to something that is perceived to be a client error (e.g.,
malformed request syntax, invalid request message framing, or deceptive
request
routing).</p><p><b>Exception</b></p><pre>java.lang.IllegalArgumentException:
Invalid character found in the request target. The valid characters are
defined in RFC 7230 and RFC 3986
org.apache.coyote.http11.Http11InputBuffer.parseRequestLine(Http11InputBuffer.java:502)
org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:502)
org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:818)
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1623)
org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
java.lang.Thread.run(Thread.java:748)</pre><p><b>Note</b> The full stack
trace of the root cause is available in the server logs.</p><hr
class="line" /><h3>Apache Tomcat</h3></body></html>
I am not sure what I am missing here. I would appreciate some help in
getting this sorted.
--
Regards
Nikhil
