i have a problem to run configure.init() in my Jetty-container (run-jetty-run in Eclipse with Springframework )
After reaching configure.init() the client-service blocks without any notice or exception.
If i run the same code in a console-java program it works.
I would expect output:
Enter init()
OK init()
Server-Version:2.6.1
Does somebody has any idea or experience with it ?
Java-Driver-version is 2.5.7.
Codesnippet:
public void arangoVersion() {
try {
configure = new ArangoConfigure();
write("Enter init()");
configure.init();
write("OK init()"); // never reached :(
arangoDriver = new ArangoDriver(configure);
write("Server-Version:" + arangoDriver.getVersion().getVersion());
} catch (ArangoException ax) {
write("Arango-Exception" + ax.getErrorMessage() + " , Nr. : "
+ ax.getCode());
} catch (Exception ex) {
write("Exception" + ex.getMessage() );
}
}
public void write( String text ) {
System.out.println( text );
// for web: logger.debug( text );
}
Thanks in advance
SOLVED
Are there different versions of httpclient.jar in your maven
dependencies? The java driver uses httpclient 4.3.6 which is not
compatible with older versions. – fceller Aug 28 at 8:20
Yes, indeed there was the mentioned version conflict with httpclient. An older httpclient-version was in an included (Eclipse-)project.
So configure.init() is working now.
(I would propose to catch the no-class-found-exception explitely in the Arango-Java-Driver and to make a version-check and output for httpclient. httpclient is widely spread.)
After updating the httpclient and resolving some small incompatibilities with my application the second problem occurs:
Now the ArangoDriver ran into the void with no visible reaction in my spring-application.
A debugging-session revealed that the actions of ArangoDriver where encapsulated in Springframework-transactions due AOP-coverage for all Spring-services and throws a NoClassFound-exception for the ArangoDriver.
After moving the Arango-java-driver in the same Maven-POM-layer as the SpringTX it was running perfectly.
Thanks to all.
Related
I am working on a small tool to schedule p4 sync daily at specific times.
In this tool, I want to display the outputs from the P4API while it is running commands.
I can see that the P4API.net has a P4Callbacks class, with several delegates: InfoResultsDelegate, TaggedOutputDelegate, LogMessageDelegate, ErrorDelegate.
My question is: How can I use those, I could not find a single example online of that. A short example code would be amazing !
Note: I am quite a beginner and have never used delegates before.
Answering my own questions by an example. I ended up figuring out by myself, it is a simple event.
Note that this only works with P4Server. My last attempt at getting TaggedOutput from a P4.Connection was unsuccessful, they were never triggered when running a command.
So, here is a code example:
P4Server p4Server = new P4Server(syncPath);
p4Server.TaggedOutputReceived += P4ServerTaggedOutputEvent;
p4Server.ErrorReceived += P4ServerErrorReceived;
bool syncSuccess = false;
try
{
P4Command syncCommand = new P4Command(p4Server, "sync", true, syncPath + "\\...");
P4CommandResult rslt = syncCommand.Run();
syncSuccess=true;
//Here you can read the content of the P4CommandResult
//But it will only be accessible when the command is finished.
}
catch (P4Exception ex) //Will be caught only when the command has completely failed
{
Console.WriteLine("P4Command failed: " + ex.Message);
}
And the two methods, those will be triggered while the sync command is being executed.
private void P4ServerErrorReceived(uint cmdId, int severity, int errorNumber, string data)
{
Console.WriteLine("P4ServerErrorReceived:" + data);
}
private void P4ServerTaggedOutputEvent(uint cmdId, int ObjId, TaggedObject Obj)
{
Console.WriteLine("P4ServerTaggedOutputEvent:" + Obj["clientFile"]);
}
I have a jax-rs-based REST service that I run on Tomcat 8.5 on 64bit Linux, using Java 11; this service connects to a RavenDB 4.1.2 instance, also on the same Linux machine. I make use of the streaming query to return the request result. I use Postman to submit the same request, and everything works well: the results are returned, and rather quickly.
However - it only works 10 times. When I submit the same request as previously an 11th time, the results = currentSession.advanced().stream(query); line hangs and doesn't return.
At first I thought I could have something to do with the StreamingOutput or OutputStreamWriter not being closed appropriately. or perhaps something do to with the Response - but as I stepped through the deployed code in Eclipse in debug mode, I noticed that execution hangs on that streaming line.
(I find exactly 10 times to be a peculiarly "human choice" kind of number...)
The relevant parts of my code:
#GET
#Path("/abcntr/{ccode}/{st}/{zm}")
#Produces(MediaType.TEXT_PLAIN)
#Consumes(MediaType.TEXT_PLAIN)
public Response retrieveInfo(#PathParam("ccode") String ccode, #PathParam("st") String st, #PathParam("zm") String zm)
{
(...)
StreamingOutput adminAreaStream = new StreamingOutput()
{
ObjectWriter ow = new ObjectMapper().writer().withDefaultPrettyPrinter();
#Override
public void write(OutputStream output) throws IOException, WebApplicationException
{
try(IDocumentSession currentSession = ServiceListener.ravenDBStore.openSession())
{
Writer writer = new BufferedWriter(new OutputStreamWriter(output));
(...)
if(indexToBeQueried.startsWith("Level0"))
{
IDocumentQuery<AdministrativeArea> query = currentSession.query(area.class, Query.index(indexToBeQueried))
.whereEquals("i", ccode);
results = currentSession.advanced().stream(query);
}
else
{
IDocumentQuery<AdministrativeArea> query = currentSession.query(area.class, Query.index(indexToBeQueried))
.whereEquals("i", ccode)
.andAlso()
.whereEquals("N1", sName);
results = currentSession.advanced().stream(query); // THIS IS WHERE IT DOESNT COME BACK
}
while(results.hasNext())
{
StreamResult<AdministrativeArea> adma = results.next();
adma.getDocument().properties = retrievePropertiesForArea(adma.getDocument(), currentSession);
writer.write(ow.writeValueAsString(adma.getDocument()));
writer.write(",");
}
(...)
currentSession.advanced().clear();
currentSession.close();
}
catch (Exception e)
{
System.out.println("Exception: " + e.getMessage() + e.getStackTrace());
}
}
};
if(!requestIsValid)
return Response.status(400).build();
else
return Response.ok(adminAreaStream).build();
}
The RavenDB error logs come up empty, as do the Tomcat error logs. The only thing that remotely resembles an error message relevant to this is something that shows up from "Gather debug info":
System.ArgumentNullException: Value cannot be null.
Parameter name: source
at System.Linq.Enumerable.Any[TSource](IEnumerable`1 source, Func`2 predicate)
at Raven.Server.Documents.Handlers.Debugging.QueriesDebugHandler.QueriesCacheList() in C:\Builds\RavenDB-Stable-4.1\src\Raven.Server\Documents\Handlers\Debugging\QueriesDebugHandler.cs:line 181
at Raven.Server.ServerWide.LocalEndpointClient.InvokeAsync(RouteInformation route, Dictionary`2 parameters) in C:\Builds\RavenDB-Stable-4.1\src\Raven.Server\ServerWide\LocalEndpointClient.cs:line 61
at Raven.Server.ServerWide.LocalEndpointClient.InvokeAndReadObjectAsync(RouteInformation route, JsonOperationContext context, Dictionary`2 parameters) in C:\Builds\RavenDB-Stable-4.1\src\Raven.Server\ServerWide\LocalEndpointClient.cs:line 91
at Raven.Server.Documents.Handlers.Debugging.ServerWideDebugInfoPackageHandler.WriteForDatabase(ZipArchive archive, JsonOperationContext jsonOperationContext, LocalEndpointClient localEndpointClient, String databaseName, String path) in C:\Builds\RavenDB-Stable-4.1\src\Raven.Server\Documents\Handlers\Debugging\ServerWideDebugInfoPackageHandler.cs:line 311
Thank you for any kinds of investigation hints you can give me.
UPDATE:
Same thing when moving the compiler and Tomcat JVM back to Java 1.8.
It appears that it has nothing to do with Java 11 (or 1.8), but simply that it had slipped my attention to close CloseableIterator<StreamResult<AdministrativeArea>> results; After adding a simple results.close(); everything appears to work as it should. If this wasn't the solution, I'll come back and update.
An Exception is thrown in this particular block.
try
{
transport.m_readListener.onReadTransport(transport);
}
catch (IOException e)
{
->onIOException(e,transport);
}
The onIOException() method puts it on the log:
private void onIOException(IOException e, AbstractConnection connection)
{
String reason = e.getMessage();
...
log.error("Closing ",connection," because ",reason);
}
The reason variable in Java 8 shows a correct japanese phrase:
reason : 既存の接続はリモート ホストに強制的に切断されました。
(meaning: The existing connection was forcibly disconnected to the remote host)
When ran on Java 9, the exception message is now broken:
reason : 譌｢蟄倥?ｮ謗･邯壹?ｯ繝ｪ繝｢繝ｼ繝? 繝帙せ繝医↓蠑ｷ蛻ｶ逧?縺ｫ蛻?譁ｭ縺輔ｌ縺ｾ縺励◆縲?
The code block that checks if the Socket port is still open is inside a try catch block that catches the IOException. The message from the IOException is acquired via
String reason = e.getMessage();
if (null == reason) reason = e.toString();
Tried running the app with java.locale.providers=COMPAT,CLDR,SPI to make it behave like in Java 8 but nothing happens. Anyone has an idea on this issue? Can anyone help? Thanks!
I'm trying to convert documents(.docx/.xlsx/.pptx) to PDF using JOD Converter. I'm using OpenOffice 4.1.2 on Centos 7. My problem is, I'm getting constant CPU usage of 100% while i'm converting the file, and this is impacting the performance of overall machine. I have tried every possible option in the command line options, but ,unfortunately, haven't been able to mitigate this issue. I have searched on a lot of forums, and found that lot of other people are also facing the same problem, however, there is no solution out there. Through my readings, I realize this could be because memory leak problems in OpenOffice. Can someone please help me resolve or at-least mitigate this?
Below is the command that I use to spawn the OpenOffice instance.
/opt/openoffice4/program/soffice.bin -accept=socket,host=127.0.0.1,port=8016;urp; -env:UserInstallation=file:///tmp/.jodconverter_socket_host-127.0.0.1_port-8016 -headless -nocrashreport -nodefault -nofirststartwizard -nolockcheck -nologo -norestore
The code I'm using to convert the files is as follows:
package org.samples.docxconverters.jodconverter.pdf;
import java.io.File;
import org.apache.commons.io.FilenameUtils;
import org.artofsolving.jodconverter.OfficeDocumentConverter;
import org.artofsolving.jodconverter.office.DefaultOfficeManagerConfiguration;
import org.artofsolving.jodconverter.office.OfficeManager;
public class Word2PdfJod {
public static void main(String[] args) {
// 1) Start LibreOffice in headless mode.
OfficeManager officeManager = null;
try {
officeManager = new DefaultOfficeManagerConfiguration()
.setOfficeHome(new File("/Applications/OpenOffice.app/Contents/")).buildOfficeManager();
officeManager.start();
// 2) Create JODConverter converter
OfficeDocumentConverter converter = new OfficeDocumentConverter(
officeManager);
// 3) Create PDF
createPDF(converter);
} finally {
// 4) Stop OpenOffice in headless mode.
if (officeManager != null) {
officeManager.stop();
}
}
}
private static void createPDF(OfficeDocumentConverter converter) {
try {
long start = System.currentTimeMillis();
String src_file = "/Users/Aman/Documents/WindowsData/DocumentConversionPoc/Powerpoint2Pdf/JODConverterV3/Sample_pptx_files/AdeemSample2.pptx";
System.out.println(src_file.substring(0, src_file.lastIndexOf(".")) + "_" + FilenameUtils.getExtension(src_file) );
//Actual Conversion
converter.convert( new File(src_file), new File( src_file.substring(0, src_file.lastIndexOf(".")) + "_"
+ FilenameUtils.getExtension(src_file) +"_Jod.pdf") );
System.out.println("Time Taken in conversion - "+ (System.currentTimeMillis() - start) + "ms");
} catch (Throwable e) {
e.printStackTrace();
}
}
}
And the relevant jars can be downloaded from :
https://drive.google.com/file/d/0B4hS5IGxGOh9OE5Ca0RlbTdVclU/view?usp=sharing
If CPU is idle, a process will take 100% CPU time by default. It's normal. If this is causing hinderance in executing other processes (highly unlikely), you can set up priorities using nice.
nice <your command>
Or, you can install cpulimit, which makes your program sleep if it reaches a predefined CPU usage. Read about it here.
By reducing the number of cores your application can use, you can prevent the system from being locked:
Process.GetCurrentProcess().ProcessorAffinity = (System.IntPtr)2;
To set the affinity of CPUs using C#
My app is making heavy use of webservice calls. Lately, some of the calls got stuck. After playing around I figured out that it
happens mostly for release builds
happens in the Simulator AND on the device (iPad, iOS 4.3)
happens more often on iPad 1 than on iPad 2
it is not limited to web services an SOAP but also affects the System.Net.WebClient
does not affest [NSString stringWithContentsOfUrl:] if invoked manually, since not bound
The effect is that the CPU load of the device drops to zero. memory is stable (in my demo project 8.5MB). If I put Console.WriteLines() everywhere, I can see that the code is stuck inside one of the WebClient.Download*() methods.
The code below demonstrates that (if built RELEASE with MT 4.0.1, LLVM off or on does not matter) downloading a file from the web over and over again fails sometimes right away on the first try, sometimes after 10 times, sometimes after around 30 downloads.
It is totally random. If you think it works, kill the app and restart it and eventually it will hang.
When building the same using MT 3.2.6, the downloading goes on all day without issues. It is impossible to break it.
MONO installed is the latest available version.
Can somebody from the MT team comment on it?
using System;
using System.IO;
using System.Threading;
using System.Net;
using System.Collections.Generic;
using System.Linq;
using MonoTouch.Foundation;
using MonoTouch.UIKit;
namespace iOSTest
{
public class Application
{
static void Main (string[] args)
{
UIApplication.Main (args);
}
}
// The name AppDelegate is referenced in the MainWindow.xib file.
public partial class AppDelegate : UIApplicationDelegate
{
private Thread oThread;
// This method is invoked when the application has loaded its UI and its ready to run
public override bool FinishedLaunching (UIApplication app, NSDictionary options)
{
// Make a release build and run on iPad 1 with iOS 4.3.2.
// Fails after downloading between 1 time and 30 times on MT 4.0.1.
// It is possible that it seems to work. Then just kill the app and restart and suddenly the effect
// will become visible. If you watch it with Instruments, CPU suddenly drops to zero. The app then is
// stuck somewhere inside WebClient. After about 10 minutes, an exception will be thrown (timeout).
// Never fails on MT 3.2.6
Console.WriteLine(MonoTouch.Constants.Version);
// A label that counts how often we downloaded.
UILabel oLbl = new UILabel(new System.Drawing.RectangleF(40, 100, 150, 30));
window.AddSubview(oLbl);
// This thread downloads the same file over and over again.
// The thread is not required to demonstrate the issue. The same problem occurs
// if the download is running on the main thread.
this.oThread = new Thread(delegate()
{
using(var oPool = new NSAutoreleasePool())
{
int i = 0;
while(true)
{
// Setup webclient and download a file from my website (around 2.4 MB)
WebClient oClient = new WebClient();
// It would be nice to hange it to your own URL to save me from all the traffic.
oClient.DownloadFile(new Uri("http://www.wildsau.net/image.axd?picture=2011%2f4%2fDSC05178.JPG"), Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Personal), "test.jpg"));
// Increase counter and update label.
i++;
this.InvokeOnMainThread(delegate { oLbl.Text = i.ToString(); });
Console.WriteLine("Done " + i + " times.");
}
}
});
// Have a button that starts the action.
UIButton oBtn = UIButton.FromType(UIButtonType.RoundedRect);
oBtn.SetTitle("Download", UIControlState.Normal);
oBtn.Frame = new System.Drawing.RectangleF(40, 40, 150, 30);
oBtn.TouchUpInside += delegate(object sender, System.EventArgs e)
{
this.oThread.Start();
};
window.AddSubview(oBtn);
window.MakeKeyAndVisible ();
return true;
}
// This method is required in iPhoneOS 3.0
public override void OnActivated (UIApplication application)
{
}
}
}
From Gonzalo-
When the problem occurs, "kicking" the threadpool by adding another
work item will make the problem go away.
Something like this (not tested or compiled ;-) should do:
Timer timer = new Timer (AddMe);
...
WebClient wc = new WebClient ();
Uri uri = new Uri(url);
timer.Change (0, 500); // Trigger it now and every 500ms
byte[] bytes = wc.DownloadData(uri);
timer.Change (Timeout.Infinite, Timeout.Infinite);
....
static void AddMe (object state)
{
// Empty.
}
#
Works 100% of the time - for me at least - YMMV. And it did, once we put the code under stress (Lots of files to download) it stalled again. Just heard from MT that 4.0.6 will have the fix in it. Should see it later this week!
Promised to be fixed by Xamarin in the next major release. Still does not work in 4.0.4 though.