NXT :: descendant of Bitcoin - Updated Information

[PEDTrader]

Do I need nxt coins to start mining?  If so please send a few to 3937699229213236762.  Thanks!

[klee]

just a quick note.
after some benchmarks and monitoring i have seen a very high usage of tcpsockets.
seems they are increasing fast but reducing very slow, which leads into an out of socks
when using the api repetitive. on your vps you can check your limits like this:

cat /proc/user_beancounters | grep numtcpsock

perhaps this would explain some crashes, since many vps having small limits.
another thing is a 100% cpu client usage from time to time for ~120 seconds.
i guess the numtcpsock creating these problems, using my local machine without
these limits the client runs stable even with and after 10.000 serial api request.  
the vps is freezing quickly with these numbers.


edit: my limits are 550 (soft(hard), set by the provider. the client breaking this limit quickly.

My client was working fine with 110 peers, all of a sudden the block counter started going backwards into the negative and saying "catching up."

[Come-from-Beyond]

just a quick note.
after some benchmarks and monitoring i have seen a very high usage of tcpsockets.
seems they are increasing fast but reducing very slow, which leads into an out of socks
when using the api repetitive. on your vps you can check your limits like this:

cat /proc/user_beancounters | grep numtcpsock

perhaps this would explain some crashes, since many vps having small limits.
another thing is a 100% cpu client usage from time to time for ~120 seconds.
i guess the numtcpsock creating these problems, using my local machine without
these limits the client runs stable even with and after 10.000 serial api request.  
the vps is freezing quickly with these numbers.


edit: my limits are 550 (soft(hard), set by the provider. the client breaking this limit quickly.

Each API request is responded with "Connection: close" header. This means that client closes connection. Do sockets in TIME_WAIT state counted against the limit? If yes, then a quick fix would be to decrease time for TIME_WAIT state.

[lyynx]

I'm now showing a 0 balance with no transactions (I had 3 transfers sent to me... all 3 were listed before heading to bed last night). Running a local copy and currently in the web interface: 127.0.0.1:7875 Any ideas where to start?

Address: 7877011898990800828

First, make sure you have the lastest Nxt.zip.

Next, delete all .nxt files in your Nxt folder.

Then relauch next.

Worked for me.

[BitThink]

A quick question:
How can I know to which block (height) a transaction belongs?

[Noitev]

Can someone upload a recent blocks.nxt file please?

[inkadnb]

My client was working fine with 110 peers, all of a sudden the block counter started going backwards into the negative and saying "catching up."

I suspect this may be because my server, http://nxt.c4c.io/, might've been added as a bootstrapping node, but I'm not sure.

Down to 65 now since I had to clear the .nxt and restart the client... still redownloading the blockchain.

[inkadnb]

Can someone upload a recent blocks.nxt file please?

Are you unable to connect to any nodes? Once my client finishes syncing I will.

[abctc]

Do I need nxt coins to start mining?  If so please send a few to 3937699229213236762.  Thanks!

- a few coins sent.

[Come-from-Beyond]

A quick question:
How can I know to which block (height) a transaction belongs?

Hover the cursor over "10+". A tooltip will appear with number of confirmations. Height = Current_block_height - Number_of_confirms + 1

[inkadnb]

Can someone upload a recent blocks.nxt file please?

https://s3.amazonaws.com/nxt.c4c.io/blocks.nxt

Give that a go, I'll try to keep this somewhat updated.

[Come-from-Beyond]

Can someone upload a recent blocks.nxt file please?

I have known that transactions.nxt is important too, coz blocks.nxt doesn't contain transaction info.

https://dl.dropboxusercontent.com/u/67242472/nxtfiles.zip

Edit: Actually all these *.nxt files r wirtten and read using Java Serialization API. Is it a good approach?

[starik69]

Code:

e:\Old disks\Old E\Open\Programs\Bitcoin\Next>java -Xms512m -Xmx1024m -cp Nxt.zi
p Nxt
[2013-11-30 19:51:41.925] Nxt 0.2.17 started.
[2013-11-30 19:51:41.975] Loading transactions...
[2013-11-30 19:51:42.153] ...Done
[2013-11-30 19:51:42.164] Loading peers...
[2013-11-30 19:51:42.197] ...Done
[2013-11-30 19:51:42.211] Loading blocks...
[2013-11-30 19:51:43.260] ...Done
[2013-11-30 19:51:43.260] Loading accounts...
[2013-11-30 19:51:43.285] ...Done
[2013-11-30 19:51:43.286] Loading assets...
[2013-11-30 19:51:43.287] ...Done
[2013-11-30 19:51:43.287] Loading orders...
[2013-11-30 19:51:43.288] ...Done
[2013-11-30 19:53:05.313] Saving blocks...
[2013-11-30 19:53:05.721] ...Done
Exception in thread "pool-1-thread-3" java.lang.NullPointerException
        at Nxt$2.completed(Unknown Source)
        at Nxt$2.completed(Unknown Source)
        at sun.nio.ch.Invoker.invokeUnchecked(Unknown Source)
        at sun.nio.ch.Invoker$2.run(Unknown Source)
        at sun.nio.ch.AsynchronousChannelGroupImpl$1.run(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
        at java.lang.Thread.run(Unknown Source)
[2013-11-30 19:53:40.963] Saving blocks...
[2013-11-30 19:53:41.303] ...Done
Exception in thread "Thread-9" java.nio.channels.WritePendingException
        at sun.nio.ch.AsynchronousSocketChannelImpl.write(Unknown Source)
        at sun.nio.ch.AsynchronousSocketChannelImpl.write(Unknown Source)
        at java.nio.channels.AsynchronousSocketChannel.write(Unknown Source)
        at Nxt$2.completed(Unknown Source)
        at Nxt$2.completed(Unknown Source)
        at sun.nio.ch.Invoker.invokeUnchecked(Unknown Source)
        at sun.nio.ch.Invoker.invokeUnchecked(Unknown Source)
        at sun.nio.ch.WindowsAsynchronousSocketChannelImpl$WriteTask.completed(U
nknown Source)
        at sun.nio.ch.Iocp$EventHandlerTask.run(Unknown Source)
        at sun.nio.ch.AsynchronousChannelGroupImpl$1.run(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
        at java.lang.Thread.run(Unknown Source)

[xibeijan]

Do I need nxt coins to start mining?  If so please send a few to 3937699229213236762.  Thanks!

- a few coins sent.

A few million?

[inkadnb]

Can someone upload a recent blocks.nxt file please?

I have known that transactions.nxt is important too, coz blocks.nxt doesn't contain transaction info.

https://dl.dropboxusercontent.com/u/67242472/nxtfiles.zip

Edit: Actually all these *.nxt files r wirtten and read using Java Serialization API. Is it a good approach?

I'm not sure, they seem very corruption prone right now which is rather worry-some. They seem to get corrupted anytime I kill the program CTRL+D. Sometimes they just... explode on their own. I don't know if that's an issue with the Java Serialization class or if it's more like the data doesn't get completely flushed to the file, therefore leaving a block or some piece of data in a partially written state...

[Come-from-Beyond]

I'm not sure, they seem very corruption prone right now which is rather worry-some. They seem to get corrupted anytime I kill the program CTRL+D. Sometimes they just... explode on their own. I don't know if that's an issue with the Java Serialization class or if it's more like the data doesn't get completely flushed to the file, therefore leaving a block or some piece of data in a partially written state...

I noticed blocks.nxt is corrupted only if there is no free memory. I see "Saving blocks..." but no "...done" after it.

[Rluner]

Hi All.

Ive setup Nxt by following all the instructions, all seems to be working, but what do I need to do next?

Do I need to receive some coins from someone to continue?     Nxt 13953498912522080539

Ok Ive answered this bit by reading..

1. Unlock ur account
2. Make sure u have at least 1 NXT
3. Make sure the very 1st transaction has at least 1440 confirmations
4. Open [Recent blocks]
5. Keep on watching the timer that says "You can generate the next block in 36 minutes 5 seconds"
6. U can close the webpage, but don't lock the account

Can someone please send me one Nxt  to address    13953498912522080539    to get me started please?

Do I just leave it running to assist?

Does this earn me credits?

After about 30 minutes of running it appeared I had a balance of 2 for an unknown reason, 2 hours later I had zero, yet I had done nothing and have zero transactions all the time.

I also have over 14 digits to my password.

Any assistance welcomed. TY.

[ImmortAlex]

Edit: Actually all these *.nxt files r wirtten and read using Java Serialization API. Is it a good approach?

It is really bad. It's better to use some java embedded sql engine like H2 or HSQLDB.

[Come-from-Beyond]

Edit: Actually all these *.nxt files r wirtten and read using Java Serialization API. Is it a good approach?

It is really bad. It's better to use some java embedded sql engine like H2 or HSQLDB.

I see. Now blockchain is not big, but later we should do it for sure.

[abctc]

Can someone please send me one Nxt  to address    13953498912522080539    to get me started please?

- a few coins sent.