org.apache.manifoldcf.core.interfaces.ManifoldCFException: Database exception: Exception doing query: ERROR: out of shared memory Hint: You might need to increase max_pred_locks_per_transaction.

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Try downgrading PostgresSQL server to 9.5 or update your PostgresSQL driver to 9.4-1211 with the following command: <postgresql.version>9.4.1211</postgresql.version>

Solutions on the web

via manifoldcf-user by Erlend Garåsen, 1 year ago
Database exception: Exception doing query: ERROR: out of shared memory Hint: You might need to increase max_pred_locks_per_transaction.
via manifoldcf-user by Erlend Garåsen, 1 year ago
Database exception: Exception doing query: ERROR: out of shared memory Hint: You might need to increase max_pred_locks_per_transaction.
via manifoldcf-user by Shigeki Kobayashi, 1 year ago
Database exception: SQLException doing query (41000): Lock wait timeout exceeded; try restarting transaction
via incubator-connectors-user by Diercks Steffan, 1 year ago
Database exception: E xception doing query: ERROR: syntax error at or near "$1"
via manifoldcf-user by Karl Wright, 1 year ago
Database exception: Exception doing query: Instrukcja została przerwana, ponieważ mogła spowodować powstanie duplikatu wartości klucza w regule ograniczającej klucz unikalny lub podstawowy albo w unikalnym indeksie identyfikowanym przez obiekt 'C1338469165883' zdefiniowany dla 'EVENTS'.
via manifoldcf-user by Marcin Goss, 1 year ago
Database exception: Exception doing query: Instrukcja została przerwana, ponieważ mogła spowodować powstanie duplikatu wartości klucza w regule ograniczającej klucz unikalny lub podstawowy albo w unikalnym indeksie identyfikowanym przez obiekt 'C1338469165883' zdefiniowany dla 'EVENTS'.
org.apache.manifoldcf.core.interfaces.ManifoldCFException: Database exception: Exception doing query: ERROR: out of shared memory Hint: You might need to increase max_pred_locks_per_transaction.
at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:2102)
at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:1835)
at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:257)
at org.postgresql.jdbc2.AbstractJdbc2Statement.execute(AbstractJdbc2Statement.java:500)
at org.postgresql.jdbc2.AbstractJdbc2Statement.executeWithFlags(AbstractJdbc2Statement.java:388)
at org.apache.manifoldcf.core.database.Database.execute(Database.java:826)
at org.apache.manifoldcf.core.database.Database$ExecuteQueryThread.run(Database.java:641)

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