Tiago Vieira ( 
https://osgeo-org.atlassian.net/secure/ViewProfile.jspa?accountId=5bb2534d1767377761ba6938
 ) *created* an issue

GeoServer ( 
https://osgeo-org.atlassian.net/browse/GEOS?atlOrigin=eyJpIjoiMTBhNDQzYmE3OGZhNGNhZmE0MDAyMWVkMDk4MzFkODYiLCJwIjoiaiJ9
 ) / Bug ( 
https://osgeo-org.atlassian.net/browse/GEOS-10132?atlOrigin=eyJpIjoiMTBhNDQzYmE3OGZhNGNhZmE0MDAyMWVkMDk4MzFkODYiLCJwIjoiaiJ9
 ) GEOS-10132 ( 
https://osgeo-org.atlassian.net/browse/GEOS-10132?atlOrigin=eyJpIjoiMTBhNDQzYmE3OGZhNGNhZmE0MDAyMWVkMDk4MzFkODYiLCJwIjoiaiJ9
 ) Deadlock at org.geotools.xsd.XSD.getSchema ( 
https://osgeo-org.atlassian.net/browse/GEOS-10132?atlOrigin=eyJpIjoiMTBhNDQzYmE3OGZhNGNhZmE0MDAyMWVkMDk4MzFkODYiLCJwIjoiaiJ9
 )

Issue Type: Bug Affects Versions: 2.18.1 Assignee: Unassigned Attachments: 
catalina.out Created: 01/Jul/21 11:58 AM Priority: Medium Reporter: Tiago 
Vieira ( 
https://osgeo-org.atlassian.net/secure/ViewProfile.jspa?accountId=5bb2534d1767377761ba6938
 )

You can check on the thread dump that we have a runnable thread opening a ZIP 
file, while all the other threads are blocked trying to get a xsd schema.

Runnable thread:

Full thread dump OpenJDK 64-Bit Server VM (25.292-b10 mixed mode):

"localhost-startStop-2" #711 daemon prio=5 os_prio=0 tid=0x00007f3b70038000 
nid=0xbb7 runnable [0x00007f3b49022000]
  java.lang. Thread.State: RUNNABLE
        at java.util.zip.ZipFile.open(Native Method)
        at java.util.zip.ZipFile.<init>(ZipFile.java:225)

One of the blocked threads:

"http-nio-15080-exec-220" #594 daemon prio=5 os_prio=0 tid=0x00007f3b78098000 
nid=0x6f3 waiting for monitor entry [0x00007f3b48210000]
  java.lang. Thread.State: BLOCKED (on object monitor)
        at org.geotools.xsd.XSD.getSchema(XSD.java:184)
        - waiting to lock <0x00000000c2c4ef98> (a 
org.geoserver.wfs.xml.v1_1_0.WFS)
        at org.geotools.xsd.SchemaLocator.locateSchema(SchemaLocator.java:86)

( 
https://osgeo-org.atlassian.net/browse/GEOS-10132#add-comment?atlOrigin=eyJpIjoiMTBhNDQzYmE3OGZhNGNhZmE0MDAyMWVkMDk4MzFkODYiLCJwIjoiaiJ9
 ) Add Comment ( 
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 )

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