Android Question icons not showing up in webserver kitkat

It might be a sockets limit. For a real server you will get much better results with B4J and a PC or Raspberry Pi.

a good idea yes.....didnt thought about that possibility

the problem with the pi is its corrupting the SD card. a lot is already writting about this issue. I changed now from class 10 to class 4, loaded the latest Rasbian with kernel >4, and made a uninterupptible Powerunit. If the files are corrupted again i need a other solution for 24/7 applications

I'm not sure that this is a real issue now. Have you actually encountered such error?

with the pi? many times. Last issue i didnt touched it for 2 months. The application was still working, so no powerfail has occured. I could login the pi, but after that all commands where dead. I even couldnt restart the pi. The b4j application was running in memory, thus ok. All data is stored on a USB stick to protect it. I discovered that 1 sector of the SD card has been corrupted, need to lowformat the SD card and 14 K was left of the 16K.
Last summer 2016 the SD card was completly corrupted. So at least i encounted this >5 times.
a topic about this issue : https://github.com/raspberrypi/firmware/issues/397

(As the application is running at a distance of 700km a made a backup pi to ensure the process is continued in case the pi breaks down again.)

Can't you write to the USB stick directly instead of writing to the SD card?

i store the data now on the USB stick. Even that the SD card was again corrupted. So the b4j application didnt wrote anything to SD last time the pi broke down again
Last step i can test: pi3 can boot from USB stick. the SD card isnt needed anymore. http://www.instructables.com/id/Boot-the-Raspberry-Pi-from-USB/