<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=us-ascii">
<meta name=Generator content="Microsoft Word 12 (filtered medium)">
<style>
<!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri","sans-serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
span.E-MailFormatvorlage17
{mso-style-type:personal-compose;
font-family:"Calibri","sans-serif";
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;}
@page Section1
{size:612.0pt 792.0pt;
margin:70.85pt 70.85pt 2.0cm 70.85pt;}
div.Section1
{page:Section1;}
-->
</style>
<!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
</head>
<body lang=DE link=blue vlink=purple>
<div class=Section1>
<p class=MsoNormal><span lang=EN-US>Hello,<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>I just started using jCIFS a couple of days
before, but now I'm experiencing some problems. My application throws an OOME
while trying to list the content of a directory.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>The exception message:<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>Exception
in thread "AWT-EventQueue-0" java.lang.OutOfMemoryError: unable to
create new native thread<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>
at java.lang.Thread.start0(Native Method)<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>
at java.lang.Thread.start(Thread.java:597)<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>
at jcifs.UniAddress.lookupServerOrWorkgroup(UniAddress.java:173)<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>
at jcifs.UniAddress.getAllByName(UniAddress.java:290)<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>
at jcifs.UniAddress.getByName(UniAddress.java:245)<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>
at jcifs.smb.Dfs.getTrustedDomains(Dfs.java:62)<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>
at jcifs.smb.Dfs.resolve(Dfs.java:167)<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>
at jcifs.smb.SmbFile.resolveDfs(SmbFile.java:666)<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>
at jcifs.smb.SmbFile.send(SmbFile.java:768)<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>
at jcifs.smb.SmbFile.doFindFirstNext(SmbFile.java:2023)<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>
at jcifs.smb.SmbFile.doEnum(SmbFile.java:1731)<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>
at jcifs.smb.SmbFile.listFiles(SmbFile.java:1708)<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>
at jcifs.smb.SmbFile.listFiles(SmbFile.java:1641)<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>
at as_file.as_smb_lister.findFile(as_smb_lister.java:140)<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>
...<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>The code for finding the file:<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>public
static SmbFile[] findFile(SmbFile startFolder, String filename) {<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>
ArrayList<SmbFile> files = new ArrayList<SmbFile>();<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>
ArrayList<SmbFile> foldersToWalk = new ArrayList<SmbFile>();<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'> <o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>
try {<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>
if (startFolder.isDirectory()) {<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>
foldersToWalk.add(startFolder);<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>
}<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>
while (foldersToWalk.size() > 0) {<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>
SmbFile lookInto = foldersToWalk.remove(0);<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>
System.out.println("walking " + lookInto.getPath());<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>
try {<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>
SmbFile[] found = lookInto.listFiles(); // line 140<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>
for (int i = 0; i < found.length; i++) {<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>
if (found[i].getName().endsWith("/")) {<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>
foldersToWalk.add(found[i]);<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>
} else {<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>
if (found[i].getName().equals(filename)) {<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'> files.add(found[i]);<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>
}<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>
}<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>
}<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>
} catch (SmbException ex) {<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>
System.out.println(ex.getMessage());<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>
}<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'> }<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'> }
catch (SmbException ex) {<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>
System.out.println(ex.getMessage());<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'> }<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>
SmbFile[] result = new SmbFile[files.size()];<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>
for (int i = 0; i < files.size(); i++) {<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>
result[i] = files.get(i);<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'> }<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'> SmbFile[]
found = new SmbFile[files.size()];<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>
for (int i = 0; i < files.size(); i++) {<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>
found[i] = files.get(i);<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'> }<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'>
return found;<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"Courier New"'> }<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>The directory it's trying to list is
smb://KOSSEK/C$/Windows/winsxs/Backup/ which is known to contain lots of files,
3256 files in this case.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>I noticed that there is a peak of numbers
of threads, up to more than 2000 threads (QueryThreads) at once that seem to
bring the VM to its limits. Maybe I made a mistake in my code that forces this
massive creation of threads, but I just can't find it. What can I do to fix
this?<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>Thanks in advance for your help.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal>Best regards - Peter<o:p></o:p></p>
</div>
</body>
</html>