Hello,
We recently managed to get LDM/NOAAPORT running on our VMware virtual machine. After our systems administrator set up the VMware Precision Clock, we were able to successfully process the multicast NOAAPORT stream within the LDM using the
noaaportIngester. However, we are encountering numerous dropped packets, which is preventing many products from being added to the queue. Below is a sample from our log file. I suspect that the presence of retrograde packet numbers indicates a time mismatch,
which is causing the dropped packets. On our Novra receiver, we have a strong signal with no issues related to uncorrectable rates or packet error rates.
Could you offer any advice on resolving the dropped packets issue, or suggest steps we might take to investigate further? Your assistance would be greatly appreciated.
Thank you,
Mark
---
Mark Nissenbaum
Senior Meteorologist
South Florida Water Management District
weather@sfwmd.gov | (561) 682-6113
20240918T010428.004533Z noaaportIngester[502806] process_prod.c:process_prod:229 NOTE ISNA62 BIRK 180100 inserted HDS [cat 5 type 4 ccb 2/0 seq 1583549 size 260]
20240918T010428.004563Z noaaportIngester[502806] process_prod.c:process_prod:229 NOTE ISNA62 BIRK 180100 inserted HDS [cat 5 type 4 ccb 2/0 seq 1583550 size 260]
20240918T010428.004588Z noaaportIngester[502806] process_prod.c:process_prod:229 NOTE ISNA62 BIRK 180100 inserted HDS [cat 5 type 4 ccb 2/0 seq 1583551 size 260]
20240918T010428.007712Z noaaportIngester[502806] process_prod.c:process_prod:229 NOTE ISNA62 BIRK 180100 inserted HDS [cat 5 type 4 ccb 2/0 seq 1583552 size 260]
20240918T010428.007748Z noaaportIngester[502806] process_prod.c:process_prod:229 NOTE ISNA62 BIRK 180100 inserted HDS [cat 5 type 4 ccb 2/0 seq 1583553 size 260]
20240918T010428.008328Z noaaportIngester[502806] productMaker.c:pmStart:678 ERROR OOPS, start of new product [1583555 ] with unfinished product 1583554
20240918T010428.008352Z noaaportIngester[502806] productMaker.c:pmStart:803 ERROR Product definition header version 1 pdhlen 16
20240918T010428.008359Z noaaportIngester[502806] productMaker.c:pmStart:804 ERROR PDH transfer type 71
20240918T010428.008367Z noaaportIngester[502806] productMaker.c:pmStart:812 ERROR header length 52 [pshlen = 36]
20240918T010428.008375Z noaaportIngester[502806] productMaker.c:pmStart:814 ERROR blocks per record 1 records per block 1
20240918T010428.008382Z noaaportIngester[502806] productMaker.c:pmStart:816 ERROR product seqnumber 1583555 block number 0 data block size 277
20240918T010428.008390Z noaaportIngester[502806] productMaker.c:pmStart:817 ERROR product header flag 1
20240918T010428.008397Z noaaportIngester[502806] productMaker.c:pmStart:818 ERROR prodspecific data length 0
20240918T010428.008404Z noaaportIngester[502806] productMaker.c:pmStart:819 ERROR bytes per record 0
20240918T010428.008411Z noaaportIngester[502806] productMaker.c:pmStart:820 ERROR Fragments = 0 category 5
20240918T010428.008428Z noaaportIngester[502806] productMaker.c:pmStart:827 ERROR next header offset 0
20240918T010428.008435Z noaaportIngester[502806] productMaker.c:pmStart:828 ERROR original seq number 0
20240918T010428.008442Z noaaportIngester[502806] productMaker.c:pmStart:829 ERROR receive time 1726621464
20240918T010428.008449Z noaaportIngester[502806] productMaker.c:pmStart:830 ERROR transmit time 1726621467
20240918T010428.008461Z noaaportIngester[502806] productMaker.c:pmStart:831 ERROR run ID 0
20240918T010428.008468Z noaaportIngester[502806] productMaker.c:pmStart:832 ERROR original run id 0
20240918T010428.008501Z noaaportIngester[502806] process_prod.c:process_prod:229 NOTE ISNA62 BIRK 180100 inserted HDS [cat 5 type 4 ccb 2/0 seq 1583555 size 260]
20240918T010428.008510Z noaaportIngester[502806] productMaker.c:pmStart:522 WARN Retrograde packet number: previous=14078371, latest=14078370, difference=4294967295
20240918T010428.008520Z noaaportIngester[502806] productMaker.c:pmStart:533 WARN Gap in packet sequence: 14078370 to 14078372 [skipped 1]
20240918T010428.008527Z noaaportIngester[502806] productMaker.c:pmStart:535 WARN prevProdSeqNum=1583554, pdh->seqno=1583556, prevBlockNum=1, pdh->dbno=0
20240918T010428.008551Z noaaportIngester[502806] process_prod.c:process_prod:229 NOTE ISXD03 EDZW 180000 CCA inserted HDS [cat 5 type 4 ccb 2/0 seq 1583556 size 453]
