Programming :: Java - Too Many Files Open?
Feb 18, 2010
i am creating program that gets 'key' string and directory path and finds if key string is present in any file under given path, everything seemed OK but when i put path like "/" after 5 mins i get error : Too many opened files. I've minimalized opened File object at the same time as much as posible, tried to call System.gc(),tried to close every stream every opened file, google but i still cannot search in bigger directories.
Algorithm (mine one is much bigger so i tried to make it as small as possible:
read 'path';
read 'key'(set as public);
#&
call method get('path') {
[Code]....
why I always get that runtime error ? (I need it to search hundreds of GB so when my 40GB partition do this what will bigger one do )
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Feb 14, 2010
does anyone know how to open .doc .ppt .xls .docx.... files using java ? i found just Apache POI but it can open just .xls files.
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Apr 16, 2010
I am running a java socket application where it reads the data and write to text file and a database at the same time. After some time I get this error? I am totally lost I dont know where is my error?
Attached is my code.
Code:
import java.io.*;
import java.net.*;
import java.util.*;
import java.util.Date;
import java.text.*;
[Code]...
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Sep 19, 2010
In my application I came across a new requirement where I have to convert RTF files to Word and PDF formatted files. I am searching for an API using which my java application can able to convert the above specified formats.
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Feb 4, 2016
i cannot seem to find a proper way to make Java my default application to open .jar files. I just made a new Debian 8.3 install on my laptop HP Pavilion G6 and the default application for opening .jar files is the Archive Manager. But when i go to "Open with.." section on right-clicking the .jar file, i get no JRE or JDK option to choose. I just installed the openjdk 7. I can manually run them from the bash, but it would be much more convenient if i just double-clicked it. Here is what i get when i run several commands in the bash :
1) which java ->Code: Select all /usr/lib/jvm/java-7-openjdk-amd64/bin/java
2) java -version -> Code: Select alljava version "1.7.0_95"
OpenJDK Runtime Environment (IcedTea 2.6.4) (7u95-2.6.4-1~deb8u1)
OpenJDK 64-Bit Server VM (build 24.95-b01, mixed mode)
3) echo $PATH: Code: Select all/usr/lib/jvm/java-7-openjdk-amd64/bin:/usr/lib/jvm/java-1.7.0-openjdk-amd64/bin: /usr/local/ sbin:/usr/local/bin:/ usr/ sbin:/usr/bin:/ sbin:/bin
4) javac -version : Code: Select alljavac 1.7.0_95
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Oct 29, 2010
I am trying to write a script where I can install Java and Tomcat from tar file, I don't need to use any rmp files, that's why I am asking if there's a way how to install them.
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Mar 28, 2011
I am trying to understnd where java preferences are stored based on web search I understand they are somewhat like windows registry - stored out there somewhere. web suggested things like hidden files or directories - and i've look all over th eplace withour result on Fedora 14. trying to start a program. got part way in and had given some info and then it blew. it still remembers my iput - which may have been wrong. ive looked at code and see it uses the java preferences system - wpould like to find and erase.
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Feb 10, 2010
i want to open and read /dev/pts/o file as a user how can i open? using normal fopen and fread functions? is it possible to open lik dat ? it der any alternate way to open and read the device files in ubuntu
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May 1, 2010
This for Kernel 2.6.29.6. I'm trying to code a kernel module that displays process information.
how to count opened file descriptors per task. I have been able to write a module that lists all the current process names along with their pid number in /var/log/messages. Basically, I cycle through the ring of processes using the macro for_each_process(task) and printk the comm and pid of each task. I'm trying to see how many file descriptors each task has open. I've been reading up in books and all over the internet. At first I thought I needed to access max_fds under files_struct, but that just lists the maximum number of file descriptors that can be opened per task, which by default is set at 256. I then thought about counting the elements in the fd_array. But then I learned that every task's fd_array is initially set at 32. Now I know that I need to access open_fds of type fd_set * in files_struct. open_fds is a pointer to all the open file descriptors. The problem is that I don't know how to access a pointer of type fd_set.
Is there a good guide or book that really focuses on type fd_set and open_fds? Every book and resource I've read never really go into depth on this. relationship between files struct, open_fds, and the open file descriptors in task?
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Mar 7, 2010
Groovy is an object-oriented programming language for the Java platform. I do not have experience in Java, only perl and shell scripts. Recently I have been asked to maintain a software written in groovy (also to make enhancements). So can I learn groovy without knowing java language. or isit I have to learn java before venturing into groovy.
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Feb 2, 2011
I'm trying to write a mediaplayer for my phone + computer in python... It is going well, but I ran into a problem when I moved the programme from my phone (where it worked) to my computer (where it didn't). The error I got was:
Code:
File "./hearse.py", line 169, in getSongInfo
File "/home/joshua/scripts/python2/myMusic.py", line 120, in getSongTitle
[code]....
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Oct 18, 2010
I have two txt files containing x and y coordinates: xcoord.txt & ycoord.txt. I need to open them; read them line by line to get each coordinate; then each time I need to update Xs and Ys parameters inside another file called "dc.in" with the grabbed values.
Finally each time I need to run two exe files ( dc_2002 and st_vac) and produce corresponding output for each Xs and Ys ( dc.in is an input file for this exe files)
I have written the following code but it does not work:
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Jan 9, 2010
they keep coming up with Error: To many open files but none of the files in them are open?
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May 25, 2010
I have a java program with gui. I want to start this program in the start of system (rc3.d) and when I connect to the machine bring to front without open another time the program. I want to connect to opened program in the start of system.
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Mar 2, 2010
I want to know the procedure to set java path in open suse to get it into working state.
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Feb 13, 2010
I always wanted to get into writing open source applications for debian. The only problem I ever saw was that I do not know C++ which seems to be the popular language to build applications. My expertise is Java and I think that java applications could run on debian just as good as C++ applications. What I do at work is write applications in java for unix systems so I think I porting my skills over to debian would not be a problem. I have not seen any applications in java on debian yet and thought people might have a problem with them. Is there any reason more java applications are not being written on debian? Also does anyone know of hand if there is any orphaned java application for debian. I had a look on this page but it is hard to know what language the application is written in. [URL]
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Jan 12, 2011
I am not able to open excel file which is generated from java web application in Linux. The file is opening in Windows but not in Linux. I am not using Open Office. I have two different applications deployed in two different was7 servers in same Linux machine. Both the applications generate excel output stream which I open in IE. When I am trying the same application in Windows environment both are working fine, but in Linux I can open and download xls files in one application but not in other. I am using application/vnd-ms... as mime type and POI jars to generated excel, no errors in my debug log or system errors.
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Jun 17, 2010
Is there a good open source alternative to flash and/or java out there? I really don't want to support adobe and java irritates me because for some reason I can't install it without also installing firefox (why are they dependent?) so I'd like to try something else.
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Dec 12, 2010
Server - Ubuntu 10.04.1 lts
Client - Kubuntu 10.10
When I try to open any nfs-mounted file using OpenOffice, I get a pop-up window titled "Document in Use". The text of the message is:
"Document file 'abcde.odt' is locked for editing by:
Unknown User
Open document read-only or open a copy of the document for editing." I then have three options - <Open Read-Only>, <Open Copy>, & <Cancel> If I cp any of these files from the mounted directory to my home dir (not mounted), I can open them without problem.Also, my firefox & thunderbird date are in this mounted directory as well (sym links to ~dan/.mozilla & ~dan/.thunderbird). Both of these apps hang when trying to open, leaving two processes behind that need to be manually killed. Again, cp'ing the data out of the nfs-mounted dir onto a local dir resolves the issue, so I am 100% confident there is nothing missing or corrupted in the firefox &/or thunderbird data...
relevant entry in /etc/fstab:
server:/nfs/dan/Documents /home/dan/Documents nfs defaults 0 0
relevant entry in server's /etc/exports:
/nfs/dan/Documents client(rw)
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Oct 1, 2010
I have a while(1) loop, and the error is: glibtop: open (/proc/stat): Too many open files This error occurs after about a half hour to an hour of running. I've tried running this multiple times, both with using glib_close() at the end of the loop, using glib_init() and glib_close() at beginning/end, and just using glib_init(). The strange thing is these have no effect on the actual glib_get functions.
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Oct 12, 2010
I cant open xls files in a shared folder using open office 3.1. Its all started when i install a new open office version. when im using open office 3.0.8 i can open all the files but now i cant even open it. Its always display untitled documents.
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Jun 9, 2010
I read this morning that MicroSoft and Adobe Flash released a huge security update to counter the threat of malicious apps taking over systems. Included in the fix was Excel spreadsheets. Apparently a hacker could send a spreadsheet that if opened could remotely take over your machine. I opened my update manager and there was a sizable Open Office and Java update.
Question: Are Linux/Ubuntu machines susceptible to the security flaws?
Question: Since Adobe Flash is considered proprietary and not updated through the Ubuntu update manager, do I have to manually update that package?
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Aug 14, 2010
Dear experts,I have a question about open() function of gcc3.4.6.I write a example:
Code:
using namespace std;
#include<iostream>
#include<fstream>
int main()
{
[Code].....
It can be compiled and ran.The statement file=txt_stream_file is in order to change char* to const char*. But open() function is not work,and out: can not open plots/results.txt The open() function of gcc3.4.6 is:
[Code]....
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Feb 26, 2010
I have a java application that I wrote recently. It runs off port 9955. The application runs great on my mac server. When I installed it on my linux box i cant get to it from outside the box. A port scan shows the port as closed. I flushed my iptables, did not help. I can telnet into the app locally, from the server and it works great. I cannot telnet from outside the server. I have a reference to the application in /etc/services as a tcp port (which it is).
netstat shows it as listening
netstat --listen
tcp6 0 0 [::]: SimpleSocketTest [::]:* LISTEN
netstat -anp | grep 9955
tcp6 0 0 ::: 9955 :::* LISTEN�1484/java
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May 5, 2010
Im trying to install Yahoo site builder using wine... the problem is that this program needs java. I tried to install java using wine but it just wont run. Native linux java doesnt works...
Heres the terminal log:
----------------------------------------------------------
hilderith@cpe-001966e2bdb4:~> cd /home/hilderith/Download
hilderith@cpe-001966e2bdb4:~/Download> su
Password:
[Code]....
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Jan 6, 2011
how to implement this.
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May 25, 2011
How do you convert Open Office (ODT) documents to Text files?
I have made a report using libre office. Now I wish to continue editing the document using lyx (latex front end). So the ODT file needs to be saved as some .tex file.
I don't see an option to do this in File menu (export/save as). So is there any other plugin to do this?
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Mar 12, 2010
I would like to run java program on fedora10 but I am facing some problems. When I use which java command it show usr/bin/java directory. I was trying to set the java_home path in bash_profile,but there is no affect.
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May 12, 2011
Situation: this semester I took an class called Introduction to Software Design with Java.It was my first intro to programming. The class had a very odd structure:1. The text was extremely high level. The first few chapters were all about object oriented programming, how objects interact, all about specification, etc (without ever talking about implementation).2. The lecture simply followed (directly) the text. And as a result was rather uninteresting.3. While highly theoretical (in that it was very high level approach), we never talked about how the computer was dealing with the information, etc.as all very "hand waving/magic" approach.
Okay so enough of the complaints:Question: This summer I'd like to dive a bit more into a language mainly out of frustration and lack of a good book. I'm thinking perhaps a lower level language.1. Would C++ be a good second language? Or should I give Java more time?2. If I am going to go with something else, is C++ sufficiently different, or should I go with C
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Apr 8, 2010
i want to compile function c in java and compile library is success.. when i call the library in java and error is :
Exception in thread "main" java.lang.UnsatisfiedLinkError: no libfunc.so in java.library.path
at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1689)
at java.lang.Runtime.loadLibrary0(Runtime.java:823)
at java.lang.System.loadLibrary(System.java:1028)
[Code]....
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