NoSuchElementException with README example

[raabf]

I tried to run CommunitiesParser with the example mentioned in README.md

CommunitiesParser/README.md

Lines 69 to 73 in 7c3f447

	You can then execute the compiled code, including again the classpath to the jar files:
	```
	java -cp .:/<download_path>/args4j-2.33.jar:/<download_path>/json-simple-1.1.1.jar:/<download_path>/commons-compress-1.16.1.jar vgiotsas/Main --outdir output --collectors rrc00 --communities 2914:1201 --period 20180407.0000,20180410.0000 --facilities "Interxion Frankfurt (FRA1-12)"
	```

However with this example an NoSuchElementException rises:

$ java -cp ./:./src/main/java/:/usr/share/java/args4j.jar:/usr/share/java/json-simple.jar:/usr/share/java/commons-compress.jar vgiotsas/Main --outdir output --collectors rrc00 --communities 2914:1201 --period 20180407.0000,20180410.0000 --facilities "Interxion Frankfurt (FRA1-12)"
Couldn't reach URL https://www.euro-ix.net/csv/ixp-service-matrix
java.io.FileNotFoundException: https://www.euro-ix.net/en/csv/ixp-service-matrix/
/usr/local/bin/bgpreader -w 1522965600,1523052000 -t ribs -P 86400 -c rrc00 -y 2914:1201
Annotated routes after initial pass: 31408
/usr/local/bin/bgpreader -w 1523052000,1523224800 -t ribs -c rrc00 -j 2a00:fda0::/32 -j  63.223.19.0/24 -j  193.105.241.0/24 -j  95.215.144.0/22 -j  104.90.192.0/23 -j  8$
.198.8.0/21 -j  204.93.58.0/24 -j  212.19.32.0/19 -j  185.212.173.0/24 -j  176.124.229.0/24 -j  185.130.177.0/24 -j  188.187.223.0/24 [… Truncated many other -j options]
Annotated routes after filtering: 31408
/usr/local/bin/bgpreader -w 1523224800,1523311200 -t updates -c rrc00 -j 2a00:fda0::/32 -j  63.223.19.0/24 -j  193.105.241.0/24 -j  95.215.144.0/22 -j  104.90.192.0/23 -j
82.198.8.0/21 -j  204.93.58.0/24 -j  212.19.32.0/19 -j  185.212.173.0/24 -j  176.124.229.0/24 [… Truncated many other -j options]
Exception in thread "main" java.util.NoSuchElementException
        at java.util.TreeMap$PrivateEntryIterator.nextEntry(TreeMap.java:1209)
        at java.util.TreeMap$KeyIterator.next(TreeMap.java:1265)
        at vgiotsas.CommunitiesParser.writeResults(CommunitiesParser.java:117)
        at vgiotsas.CommunitiesParser.startParser(CommunitiesParser.java:93)
        at vgiotsas.Main.main(Main.java:18)

java version "1.8.0_181" (TM) SE Runtime Environment (build 1.8.0_181-b13)
bgpstream 1.2.0
Debian stretch

[vgiotsas]

Thanks a lot @raabf for reporting the issue.
I've implemented CommunitiesParser to work with BGPStream v2.0. This version has many performance improvements and while it's beta it's stable.
Can you test it with v2.0 and let me know if you have any issue?