Troubleshooting---KAFKA

Building the EFU and kafka

Once cmake .. of the EFU was successful and you try to build it via make and get an error containing something like this

rdkafka_msgset_writer.c:(.text+0x4fb1): undefined reference to `mtx_lock'
rdkafka_msgset_writer.c:(.text+0x4ffb): undefined reference to `mtx_unlock'
rdkafka_msgset_writer.c:(.text+0x511a): undefined reference to `mtx_lock'
rdkafka_msgset_writer.c:(.text+0x516b): undefined reference to `mtx_unlock'

do the following:

sudo apt install librdkafka
sudo apt install librdkafka-dev
cd ~/.conan/data
conan install librdkafka/1.6.0@ --build

Then, go back to the EFU-build-directory, execute cmake .. again, and try to build the EFU again via make -j4.

No local Kafka found (1)

When you start Kafka or check if Kafka is running (essdaq/kafka/start_kafka.sh or essdaq/kafka/check_kafka.sh), this error might occur:

~/essdaq/kafka ~/essdaq/kafka
./check_kafka.sh: line 7: ../config/system.sh: No such file or directory
Checking Kafka at ip address
usage: check_kafka.py [-h] bootstrap_servers
check_kafka.py: error: the following arguments are required: bootstrap_servers
checking for local kafka instance
./check_kafka.sh: line 14: netstat: command not found
No local Kafka found

This means that the system.sh file has not been created as described in the software configuration section of this document.

No local Kafak found (2)

If you get an error related to Kafka like this:

Checking Kafka at ip address 127.0.0.1
Brokers found
checking for local kafka instance
./check_kafka.sh: line 14: netstat: command not found
No local Kafka found

Please install the net-tools: sudo apt install net-tools

No local Kafak found (3)

kafka_check.sh might say that No local Kafka found, after execute kafka_start.sh without error message. Wait 5 seconds and check again. If Kafka is still not found, try kafka_start.sh again, wait and check again. Normally, Kafka should run now. If Kafka still is not running, do the following: go to essdaq/kafka/kafka/logs/ and remove the content of the entire folder. Then try again to start Kafka and check again.